Seacor (CKH) 10-Q28 Oct 162016 Q3 Quarterly reportFinancial data

Company Profile

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
Document And Entity Information - shares	Sep. 30, 2016	Oct. 25, 2016
Document And Entity Information [Abstract]
Entity Registrant Name	SEACOR HOLDINGS INC /NEW/
Entity Central Index Key	859,598
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		17,335,753
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current Assets:
Cash and cash equivalents	$ 471,180	$ 530,009
Restricted cash	3,364	0
Marketable securities	78,717	138,200
Receivables:
Trade, net of allowance for doubtful accounts of $2,611 and $2,483 in 2016 and 2015, respectively	148,358	159,076
Other Receivables	32,452	27,217
Inventories	16,047	24,768
Prepaid expenses and other	9,500	8,627
Total current assets	759,618	887,897
Property and Equipment:
Property, Plant and Equipment, Gross	2,128,010	2,123,201
Accumulated depreciation	1,008,629	994,181
Property, Plant and Equipment, Other, Net in Service	1,119,381	1,129,020
Construction in progress	464,660	454,605
Net property and equipment	1,584,041	1,583,625
Investments, at Equity, and Advances to 50% or Less Owned Companies	331,063	331,103
Construction Reserve Funds	161,865	255,408
Goodwill	52,403	52,340
Intangible Assets, Net	23,496	26,392
Other Assets	41,647	48,654
Total assets	2,954,133	3,185,419
Current Liabilities:
Current portion of long-term debt	28,228	35,531
Accounts payable and accrued expenses	70,032	71,952
Other current liabilities	96,324	92,677
Total current liabilities	194,584	200,160
Long-Term Debt	1,013,691	1,034,859
Exchange Option Liability on Subsidiary Convertible Senior Notes	8,938	5,611
Deferred Income Taxes	307,353	389,988
Deferred Gains and Other Liabilities	148,085	163,862
Total liabilities	1,672,651	1,794,480
SEACOR Holdings Inc. stockholders’ equity:
Preferred stock, $.01 par value, 10,000,000 shares authorized; none issued nor outstanding	0	0
Common stock, $.01 par value, 60,000,000 shares authorized; 37,874,080 and 37,684,829 shares issued in 2016 and 2015, respectively	379	377
Additional paid-in capital	1,512,209	1,505,942
Retained earnings	1,004,472	1,126,620
Shares held in treasury of 20,538,327 and 20,529,929 in 2016 and 2015, respectively, at cost	1,357,331	1,356,499
Accumulated other comprehensive loss, net of tax	(10,471)	(5,620)
Stockholders' equity attributable to parent, total	1,149,258	1,270,820
Noncontrolling interests in subsidiaries	132,224	120,119
Total equity	1,281,482	1,390,939
Liabilities and stockholders' equity, total	$ 2,954,133	$ 3,185,419

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Trade receivables, allowance for doubtful accounts	$ 2,611	$ 2,483
Common Stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	37,874,080	37,684,829
Treasury stock, shares held in treasury	20,538,327	20,529,929
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0

Condensed Consolidated Statemen

Condensed Consolidated Statements Of Income - USD ($)	3 Months Ended		9 Months Ended
Condensed Consolidated Statements Of Income - USD ($)	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Operating Revenues	$ 206,983,000	$ 261,852,000	$ 617,949,000	$ 804,105,000
Costs and Expenses [Abstract]
Operating	146,796,000	175,985,000	448,146,000	582,876,000
Administrative and general	32,245,000	37,892,000	102,124,000	115,453,000
Depreciation and amortization	31,132,000	31,018,000	93,482,000	94,527,000
Total costs and expenses	210,173,000	244,895,000	643,752,000	792,856,000
Gains (Losses) on Asset Dispositions and Impairments, Net	(29,826,000)	11,264,000	(47,380,000)	10,804,000
Operating Income (Loss)	(33,016,000)	28,221,000	(73,183,000)	22,053,000
Other Income (Expense):
Interest income	5,277,000	5,065,000	15,890,000	14,118,000
Interest expense	12,504,000	10,894,000	37,273,000	31,797,000
Debt extinguishment gains (losses), net	557,000	(434,000)	5,395,000	(29,970,000)
Marketable security losses, net	(7,865,000)	(4,604,000)	(56,912,000)	(3,476,000)
Derivative losses, net	(1,174,000)	(725,000)	(109,000)	(2,295,000)
Foreign currency losses, net	(666,000)	(4,057,000)	(651,000)	(3,614,000)
Other, net	(5,460,000)	1,773,000	(12,844,000)	6,162,000
Total Other Nonoperating Income (Expense)	(21,835,000)	(13,876,000)	(86,504,000)	(50,872,000)
Income (Loss) Before Income Tax Expense (Benefit) and Equity in Earnings (Losses) of 50% or Less Owned Companies	(54,851,000)	14,345,000	(159,687,000)	(28,819,000)
Income Tax Expense (Benefit)	(21,147,000)	3,063,000	(61,737,000)	(8,736,000)
Income (Loss) Before Equity in Earnings (Losses) of 50% or Less Owned Companies	(33,704,000)	11,282,000	(97,950,000)	(20,083,000)
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(322,000)	5,123,000	(7,533,000)	10,086,000
Net Income (Loss)	(34,026,000)	16,405,000	(105,483,000)	(9,997,000)
Net Income Attributable to Noncontrolling Interests in Subsidiaries	5,777,000	9,440,000	16,665,000	1,920,000
Net Income (Loss) attributable to SEACOR Holdings Inc.	$ (39,803,000)	$ 6,965,000	$ (122,148,000)	$ (11,917,000)
Basic Earnings (Loss) Per Common Share of SEACOR Holdings Inc.	$ (2.35)	$ 0.40	$ (7.23)	$ (0.68)
Diluted Earnings (Loss) Per Common Share of SEACOR Holdings Inc.	$ (2.35)	$ 0.40	$ (7.23)	$ (0.68)
Weighted Average Common Shares Outstanding:
Basic	16,943,647	17,294,927	16,896,751	17,616,035
Diluted	16,943,647	17,561,107	16,896,751	17,616,035

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Loss Statement - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Net Income (Loss)	$ (34,026)	$ 16,405		$ (105,483)	$ (9,997)
Foreign currency translation losses	(305)	(2,722)		(6,641)	(2,167)
Reclassification of foreign currency translation losses to foreign currency losses, net		(74)	$ 0			$ (74)	$ 0
Derivative losses on cash flow hedges	(187)	(1,540)		(3,855)	(2,225)
Other	7	0		16	0
Other Comprehensive Income (Loss), before Tax	369	(4,048)		(8,318)	(3,467)
Income tax benefit (expense)	(182)	1,309		2,612	1,130
Other Comprehensive Income (Loss), Net of Tax	187	(2,739)		(5,706)	(2,337)
Comprehensive Income (Loss)	(33,839)	13,666		(111,189)	(12,334)
Comprehensive Income attributable to Noncontrolling Interests in Subsidiaries	5,625	9,133		15,810	1,682
Comprehensive Income (Loss) attributable to SEACOR Holdings Inc.	(39,464)	4,533		(126,999)	(14,016)
Interest Expense [Member]
Reclassification of derivative losses on cash flow hedges to equity in earnings (losses) of 50% or less owned companies	9	0		9	0
Equity Method Investments [Member]
Reclassification of derivative losses on cash flow hedges to equity in earnings (losses) of 50% or less owned companies	$ (785)	$ (214)		$ (2,111)	$ (925)

Condensed Consolidated Stateme6

Condensed Consolidated Statement Of Changes In Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Shares Held In Treasury [Member]	Accumulated Other Comprehensive Loss [Member]	Non-Controlling Interests In Subsidiaries [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total equity	$ 1,390,939	$ 377	$ 1,505,942	$ 1,126,620	$ (1,356,499)	$ (5,620)	$ 120,119
Employee Stock Purchase Plan	1,726	0	0	0	1,726	0	0
Exercise of stock options	1,076	0	1,076	0	0	0	0
Director stock awards	142	0	142	0	0	0	0
Restricted stock	(1,179)	(2)	(1,181)	0	0	0	0
Purchase of conversion option in convertible debt, net of tax	(4,612)	0	(4,612)	0	0	0	0
Purchases of treasury shares	(2,396)	0	0	0	(2,396)	0	0
Amortization of share awards	10,680	0	10,680	0	0	0	0
Cancellation of restricted stock	0	0	162	0	162	0	0
Dividends paid to noncontrolling interests	(3,705)	0	0	0	0	0	(3,705)
Comprehensive income:
Net loss attributable to SEACOR Holdings Inc.	(122,148)	0	0	(122,148)	0	0
Net Income Attributable to Noncontrolling Interests in Subsidiaries	16,665						16,665
Net Loss	(105,483)
Other comprehensive loss	(5,706)	0	0	0	0	(4,851)	(855)
Total equity	$ 1,281,482	$ 379	$ 1,512,209	$ 1,004,472	$ (1,357,331)	$ (10,471)	$ 132,224

Condensed Consolidated Stateme7

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement of Cash Flows [Abstract]
Net Cash Provided by Operating Activities	$ 60,242	$ 142,784
Cash Flows from Investing Activities
Purchases of property and equipment	294,115	227,244
Cash settlements on derivative transactions, net	31	0
Proceeds from disposition of property and equipment	146,195	95,396
Investments in and advances to 50% or less owned companies	12,666	43,760
Return of investments and advances from 50% or less owned companies	8,361	47,175
Net borrowings on revolving credit line to 50% or less owned companies	(1,099)	242
(Issuances of) payments received on third party leases and notes receivable, net	(1,320)	(4,416)
Net (increase) decrease in restricted cash	3,364	(16,435)
Net decrease in construction reserve funds	(93,543)	(24,552)
Net cash used in investing activities	(64,496)	(91,620)
Cash Flows from Financing Activities
Payments on long-term debt and capital lease obligations	156,321	156,632
Net repayments on inventory financing arrangements	0	(2,661)
Proceeds from issuance of long term debt, net of issue costs	114,763	197,585
Purchase of conversion option in convertible debt	7,096	0
Common stock acquired for treasury	2,396	65,214
Proceeds and tax benefits from share award plans	1,618	4,103
Issuance of noncontrolling interests, net of issue costs	0	400
Distributions to noncontrolling interests	(3,705)	(4,717)
Net cash used in financing activities	(53,137)	(27,136)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(1,438)	(1,406)
Net Increase (Decrease) in Cash and Cash Equivalents	(58,829)	22,622
Cash and Cash Equivalents, Beginning of Period	530,009	434,183
Cash and Cash Equivalents, End of Period	$ 471,180	$ 456,805

Basis of Presentation and Accou

Basis of Presentation and Accounting Policy	9 Months Ended
Basis of Presentation and Accounting Policy	Sep. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation and Accounting Policy	BASIS OF PRESENTATION AND ACCOUNTING POLICIES The condensed consolidated financial information for the three and nine months ended September 30, 2016 and 2015 has been prepared by the Company and has not been audited by its independent registered certified public accounting firm. The condensed consolidated financial statements include the accounts of SEACOR Holdings Inc. and its consolidated subsidiaries. In the opinion of management, all adjustments (consisting of normal recurring adjustments) have been made to fairly present the Company’s financial position as of September 30, 2016 , its results of operations for the three and nine months ended September 30, 2016 and 2015 , its comprehensive income (loss) for the three and nine months ended September 30, 2016 and 2015 , its changes in equity for the nine months ended September 30, 2016 , and its cash flows for the nine months ended September 30, 2016 and 2015 . Results of operations for the interim periods presented are not necessarily indicative of operating results for the full year or any future periods. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States have been condensed or omitted. These condensed consolidated financial statements should be read in conjunction with the financial statements and related notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 . Unless the context otherwise indicates, any reference in this Quarterly Report on Form 10-Q to the "Company" refers to SEACOR Holdings Inc. and its consolidated subsidiaries and any reference in this Quarterly Report on Form 10-Q to "SEACOR" refers to SEACOR Holdings Inc. Capitalized terms used and not specifically defined herein have the same meaning given those terms in the Company's Annual report on Form 10-K for the year ended December 31, 2015 . Revenue Recognition. The Company recognizes revenue when it is realized or realizable and earned. Revenue is realized or realizable and earned when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price to the buyer is fixed or determinable, and collectability is reasonably assured. Revenue that does not meet these criteria is deferred until the criteria are met. As of September 30, 2016 , deferred revenues of $6.8 million , included in other current liabilities in the accompanying condensed consolidated balance sheets, related to the time charter of several offshore support vessels scheduled to be paid through the conveyance of an overriding royalty interest (the “Conveyance”) in developmental oil and gas producing properties operated by a customer in the U.S. Gulf of Mexico. Payments under the Conveyance, and the timing of such payments, were contingent upon production and energy sale prices. On August 17, 2012, the customer filed a voluntary petition for Chapter 11 bankruptcy. The Company is vigorously defending its interest in connection with the bankruptcy filing; however, payments received under the Conveyance subsequent to May 19, 2012 are subject to creditors’ claims in bankruptcy court. The Company will recognize revenues when reasonably assured of a judgment in its favor. All costs and expenses related to these charters were recognized as incurred. Property and Equipment. Equipment, stated at cost, is depreciated using the straight-line method over the estimated useful life of the asset to an estimated salvage value. With respect to each class of asset, the estimated useful life is based upon a newly built asset being placed into service and represents the time period beyond which it is typically not justifiable for the Company to continue to operate the asset in the same or similar manner. From time to time, the Company may acquire older assets that have already exceeded the Company’s useful life policy, in which case the Company depreciates such assets based on its best estimate of remaining useful life, typically the next survey or certification date. As of September 30, 2016 , the estimated useful life (in years) of each of the Company’s major categories of new equipment was as follows: Offshore support vessels (excluding wind farm utility) 20 Wind farm utility vessels 10 Inland river dry-cargo barges 20 Inland river liquid tank barges 25 Inland river towboats 25 Product tankers - U.S.-flag 25 Short-sea Container/RORO (1) vessels 20 Harbor and offshore tugs 25 Ocean liquid tank barges 25 Terminal and manufacturing facilities 20 ______________________ (1) Roll on/Roll off (“RORO”). Equipment maintenance and repair costs and the costs of routine overhauls, drydockings and inspections performed on vessels and equipment are charged to operating expense as incurred. Expenditures that extend the useful life or improve the marketing and commercial characteristics of equipment as well as major renewals and improvements to other properties are capitalized. Certain interest costs incurred during the construction of equipment are capitalized as part of the assets’ carrying values and are amortized over such assets’ estimated useful lives. During the nine months ended September 30, 2016 , capitalized interest totaled $14.3 million . Impairment of Long-Lived Assets. The Company performs an impairment analysis of long-lived assets used in operations, including intangible assets, when indicators of impairment are present. These indicators may include a significant decrease in the market price of a long-lived asset or asset group, a significant adverse change in the extent or manner in which a long-lived asset or asset group is being used or in its physical condition, or a current period operating or cash flow loss combined with a history of operating or cash flow losses or a forecast that demonstrates continuing losses associated with the use of a long-lived asset or asset group. If the carrying value of the assets is not recoverable, as determined by the estimated undiscounted cash flows, the carrying value of the assets is reduced to fair value, if lower. Generally, fair value is determined using valuation techniques, such as expected discounted cash flows or appraisals, as appropriate. During the nine months ended September 30, 2016 and 2015 , the Company recognized impairment charges of $51.7 million and $6.9 million , respectively, related to long-lived assets held for use. When reviewing the Company’s Offshore Marine Services’ fleet for impairment, including stacked vessels expected to return to active service, the Company groups vessels with similar operating and marketing characteristics into vessel classes. As a result of the continued weak market conditions, the Company has identified indicators of impairment for certain of its owned offshore support vessels or vessel classes. As a consequence, the Company estimated their undiscounted future cash flows and determined that for one mini-supply vessel, one specialty vessel, 13 anchor handling towing supply vessels, eight supply vessels and 13 liftboats, there is sufficient uncertainty as to whether or not their carrying values would be recovered. During the nine months ended September 30, 2016 , the Company obtained independent appraisals and other market data resulting in impairment charges of $50.6 million related to these identified vessels and associated intangible assets. Due to limited market transactions, the primary valuation methodology applied by the appraisers was an estimated cost approach less estimated economic depreciation for comparably aged assets with a discount applied for economic obsolescence based on current and prior two years’ performance trending. The preparation of the undiscounted cash flows requires management to make certain estimates and assumptions on expected future rates per day worked and utilization levels for vessels and vessel classes over their expected remaining lives. Those estimates and assumptions are based on the projected magnitude and timing of a market recovery from offshore oil and gas exploration and production activity in the geographic regions where the Company operates and, as such, are highly subjective. If difficult market conditions persist and an anticipated recovery is delayed beyond the Company’s expectation, further deterioration in the fair value of vessels already impaired or revisions to management’s forecasts may result in the Company recording additional impairment charges related to its long-lived assets in future periods. Impairment of 50% or Less Owned Companies. Investments in 50% or less owned companies are reviewed periodically to assess whether there is an other-than-temporary decline in the fair value of the investment. The periodic assessment considers, among other things, whether the carrying value of the investment is able to be recovered and whether or not the investee’s ability to sustain an earnings capacity that would justify the carrying value of the investment. When the Company determines its investment in the 50% or less owned company is not recoverable or the decline in fair value is other-than-temporary, the investment is written down to fair value. Actual results may vary from the Company’s estimates due to the uncertainty regarding the projected financial performance of 50% or less owned companies, the severity and expected duration of declines in value, and the available liquidity in the capital markets to support the continuing operations of the 50% or less owned company. During the nine months ended September 30, 2016 , the Company recognized a $0.3 million impairment charge, net of tax, related to one of Offshore Marine Services’ equity method investments in equity in earnings (losses) of 50% or less owned companies in the accompanying condensed consolidated statements of income (loss). In addition, during the nine months ended September 30, 2016 , the Company recognized a $6.5 million impairment charge related to a Shipping Services’ cost investment in a foreign container shipping company in other, net in the accompanying condensed consolidated statements of income (loss). During the nine months ended September 30, 2015 , the Company did not recognize any impairment charges related to its 50% or less owned companies. Deferred Gains. The Company has sold certain equipment to its 50% or less owned companies, entered into vessel sale-leaseback transactions with finance companies, and provided seller financing on sales of its equipment to third parties and its 50% or less owned companies. A portion of the gains realized from these transactions were deferred and recorded in deferred gains and other liabilities in the accompanying condensed consolidated balance sheets. Deferred gain activity related to these transactions for the nine months ended September 30 was as follows (in thousands): 2016 2015 Balance at beginning of period $ 135,909 $ 159,911 Adjustments to deferred gains arising from asset sales 9,003 5,971 Amortization of deferred gains included in operating expenses as a reduction to rental expense (17,369 ) (16,897 ) Amortization of deferred gains included in gains (losses) on asset dispositions and impairments, net (1,852 ) (5,437 ) Other (2,850 ) (1,667 ) Balance at end of period $ 122,841 $ 141,881 Accumulated Other Comprehensive Loss. The components of accumulated other comprehensive loss were as follows (in thousands): SEACOR Holdings Inc. Stockholders’ Equity Noncontrolling Interests Foreign Currency Translation Adjustments Derivative Losses on Cash Flow Hedges, net Other Total Foreign Currency Translation Adjustments Derivative Losses on Cash Flow Hedges, net Other Other Comprehensive Loss December 31, 2015 $ (5,528 ) $ (116 ) $ 24 $ (5,620 ) $ (528 ) $ — $ 16 Other comprehensive loss (5,772 ) (1,680 ) (11 ) (7,463 ) (795 ) (55 ) (5 ) $ (8,318 ) Income tax benefit 2,020 588 4 2,612 — — — 2,612 Nine Months Ended September 30, 2016 $ (9,280 ) $ (1,208 ) $ 17 $ (10,471 ) $ (1,323 ) $ (55 ) $ 11 $ (5,706 ) Earnings (Loss) Per Share. Basic earnings (loss) per common share of SEACOR is computed based on the weighted average number of common shares issued and outstanding during the relevant periods. Diluted earnings (loss) per common share of SEACOR is computed based on the weighted average number of common shares issued and outstanding plus the effect of potentially dilutive securities through the application of the treasury stock and if-converted methods. Dilutive securities for this purpose assumes restricted stock grants have vested, common shares have been issued pursuant to the exercise of outstanding stock options and common shares have been issued pursuant to the conversion of all outstanding convertible notes. Computations of basic and diluted earnings (loss) per common share of SEACOR were as follows (in thousands, except share data): Three Months Ended September 30, Nine Months Ended September 30, Net Income (Loss) attributable to SEACOR Average O/S Shares Per Share Net Loss Attributable to SEACOR Average O/S Shares Per Share 2016 Basic Weighted Average Common Shares Outstanding $ (39,803 ) 16,943,647 $ (2.35 ) $ (122,148 ) 16,896,751 $ (7.23 ) Effect of Dilutive Share Awards: Options and Restricted Stock (1) — — — — Convertible Notes (2) — — — — Diluted Weighted Average Common Shares Outstanding $ (39,803 ) 16,943,647 $ (2.35 ) $ (122,148 ) 16,896,751 $ (7.23 ) 2015 Basic Weighted Average Common Shares Outstanding $ 6,965 17,294,927 $ 0.40 $ (11,917 ) 17,616,035 $ (0.68 ) Effect of Dilutive Share Awards: Options and Restricted Stock (1) — 266,180 — — Convertible Notes (3) — — — — Diluted Weighted Average Common Shares Outstanding $ 6,965 17,561,107 $ 0.40 $ (11,917 ) 17,616,035 $ (0.68 ) ______________________ (1) For the three months ended September 30, 2016 and 2015 , diluted earnings per common share of SEACOR excluded 2,041,652 and 846,934 , respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. For the nine months ended September 30, 2016 and 2015 , diluted earnings per common share of SEACOR excluded 2,041,652 and 2,038,450 , respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. (2) For the three months ended September 30, 2016 , diluted earnings per common share of SEACOR excluded 2,382,626 common shares issuable pursuant to the Company’s 2.5% Convertible Senior Notes, 1,825,326 common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes and 2,243,500 common shares issuable pursuant to the Company’s 3.75% Subsidiary Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. For the nine months ended September 30, 2016 , diluted earnings per common share of SEACOR excluded 2,910,688 common shares issuable pursuant to the Company’s 2.5% Convertible Senior Notes, 1,825,326 common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes and 2,243,500 common shares issuable pursuant to the Company’s 3.75% Subsidiary Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. (3) For the three and nine months ended September 30, 2015 , diluted earnings per common share of SEACOR excluded 4,200,525 common shares issuable pursuant to the Company’s 2.5% Convertible Senior Notes and 1,825,326 common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. New Accounting Pronouncements. On May 28, 2014, the Financial Accounting Standards Board (“FASB”) issued a comprehensive new revenue recognition standard that will supersede nearly all existing revenue recognition guidance under generally accepted accounting principles in the United States. The core principal of the new standard is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The new standard is effective for annual and interim periods beginning after December 15, 2017 and early adoption is permitted. The Company has not yet selected the method of adoption or determined what impact, if any, the adoption of the new standard will have on its consolidated financial position, results of operations or cash flows. On February 25, 2016, the FASB issued a comprehensive new leasing standard, which improves transparency and comparability among companies by requiring lessees to recognize a lease liability and a corresponding lease asset for virtually all lease contracts. It also requires additional disclosures about leasing arrangements. The new standard is effective for interim and annual periods beginning after December 15, 2018 and requires a modified retrospective approach to adoption. Early adoption is permitted. The Company has not yet determined what impact, if any, the adoption of the new standard will have on its consolidated financial position, results of operations or cash flows. On March 30, 2016, the FASB issued an amendment to the accounting standards, which simplifies several aspects of the accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The amendment is effective for fiscal years beginning after December 15, 2016 and interim periods within those fiscal years and early adoption is permitted. The Company has not yet determined what impact, if any, the adoption of the new standard will have on its consolidated financial position, results of operations or cash flows. Reclassifications. Certain reclassifications of prior period information have been made to conform with the presentation of the current period information. These reclassifications had no effect on net income (loss) or cash flows as previously reported.

Equipment Acquisitions, Disposi

Equipment Acquisitions, Dispositions and Depreciation and Impairment Policies Equipment Acquisitions, Dispositions and Depreciation and Impairment Policies (Notes)	9 Months Ended
	Sep. 30, 2016
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment Disclosure [Text Block]	EQUIPMENT ACQUISITIONS AND DISPOSITIONS During the nine months ended September 30, 2016 , capital expenditures were $294.1 million . Equipment deliveries during the nine months ended September 30, 2016 included twelve fast support vessels, one supply vessel, two wind farm utility vessels, two inland river towboats, twelve inland river dry-cargo barges and two U.S.-flag product tankers. In addition, the Company received one U.S.-flag harbor tug as partial consideration for the sale of certain Inland River Services equipment as described below. During the nine months ended September 30, 2016 , the Company sold one mini-supply vessel, four standby safety vessels, one supply vessel, 20 30,000 barrel inland river liquid tank barges, the rights to eight leased-in 30,000 barrel inland river liquid tank barges, 14 inland river towboats, one U.S.-flag product tanker, one U.S.-flag harbor tug and other property and equipment for net proceeds of $156.1 million ( $146.1 million in cash, $8.0 million in seller financing and one U.S.-flag harbor tug valued at $2.0 million ) and gains of $11.4 million , of which $2.4 million were recognized currently and $9.0 million were deferred (see Note 1). In addition, the Company recognized previously deferred gains of $1.9 million . Equipment dispositions included one 30,000 barrel inland river liquid tank barge currently under construction and the sale-leaseback of one U.S.-flag product tanker for $61.0 million with a leaseback term of 76 months. The Company also received $0.1 million of deposits on future equipment sales.

Investments, At Equity, And Adv

Investments, At Equity, And Advances To 50% Or Less Owned Companies	9 Months Ended
	Sep. 30, 2016
Equity Method Investment, Summarized Financial Information [Abstract]
Investments, At Equity, And Advances To 50% Or Less Owned Companies	INVESTMENTS, AT EQUITY, AND ADVANCES TO 50% OR LESS OWNED COMPANIES Falcon Global. Falcon Global was formed to construct and operate foreign-flag liftboats. During the nine months ended September 30, 2016 , the Company and its partner each contributed additional capital of $6.8 million in cash. OSV Partners. OSV Partners owns and operates offshore support vessels. During the nine months ended September 30, 2016 , the Company contributed additional capital of $1.2 million in cash. In addition, during the nine months ended September 30, 2016 , equity in losses of 50% or less owned companies, net of tax, includes $1.0 million related to the Company’s proportionate share of impairment charges associated with OSV Partners’ fleet. Other Offshore Marine Services. During the nine months ended September 30, 2016 , the Company made capital contributions of $0.2 million and received dividends of $0.4 million from its other 50% or less owned companies. During the nine months ended September 30, 2016 , equity in losses of 50% or less owned companies, net of tax, included $2.7 million for the Company’s proportionate share of impairment charges associated with its joint ventured fleet and $0.3 million for an other-than-temporary decline in the fair value of one of its investments in a 50% or less owned company. SCFCo. SCFCo was established to operate inland river towboats and inland river dry-cargo barges on the Parana-Paraguay Rivers in South America and a terminal facility at Port Ibicuy, Argentina. During the nine months ended September 30, 2016 , the Company and its partner each contributed additional capital of $0.8 million in cash. As of September 30, 2016 , the Company had outstanding loans and working capital advances to SCFCo of $27.6 million . SEA-Access. SEA-Access owned and operated a U.S.-flag crude oil tanker that was sold for scrap during the nine months ended September 30, 2016 . During the nine months ended September 30, 2016 , the Company received dividends of $2.0 million and capital distributions of $8.4 million . SeaJon. SeaJon owns an articulated tug-barge operating in the Great Lakes trade. During the nine months ended September 30, 2016 , the Company received dividends of $0.6 million . Avion. Avion is a distributor of aircraft and aircraft related parts. During the nine months ended September 30, 2016 , the Company made advances of $3.0 million . As of September 30, 2016 , the Company had $3.0 million of outstanding loans to Avion. VA&E. VA&E primarily focuses on the global origination, trading and merchandising of sugar, pairing producers and buyers and arranging for the transportation and logistics of the product. The Company provides an unsecured revolving credit facility to VA&E for up to $6.0 million , a term loan of $1.1 million and a subordinated loan of $1.0 million . During the nine months ended September 30, 2016 , VA&E borrowed $10.0 million and repaid $8.9 million on the revolving credit facility. As of September 30, 2016 , the Company had outstanding advances of $8.3 million . Other. During the nine months ended September 30, 2016 , the Company made capital contributions and advances of $0.6 million to other 50% or less owned companies. Guarantees. The Company has guaranteed the payment of amounts owed under a vessel charter, a construction contract and banking facilities by certain of its 50% or less owned companies. As of September 30, 2016 , the total amount guaranteed by the Company under these arrangements was $83.4 million . In addition, as of September 30, 2016 , the Company had uncalled capital commitments to two of its 50% or less owned companies totaling $1.8 million .

Long-Term Debt

Long-Term Debt	9 Months Ended
Long-Term Debt	Sep. 30, 2016
Long-term Debt and Capital Lease Obligations [Abstract]
Long-Term Debt	LONG-TERM DEBT SEACOR’s Board of Directors previously approved a securities repurchase plan that authorizes the Company to acquire SEACOR’s common stock, par value $0.01 per share (“Common Stock”), 7.375% Senior Notes, 3.0% Convertible Senior Notes, and 2.5% Convertible Senior Notes (collectively the “Securities”) through open market purchases, privately negotiated transactions or otherwise, depending on market conditions. As of September 30, 2016 , the Company’s repurchase authority for the Securities was $64.8 million . 2.5% Convertible Senior Notes. During the nine months ended September 30, 2016 , the Company repurchased $117.4 million in principal amount of its 2.5% Convertible Senior Notes for total consideration of $114.9 million . Consideration of $107.8 million was allocated to the settlement of the long-term debt resulting in gains on debt extinguishment of $3.3 million included in the accompanying condensed consolidated statements of income (loss). Consideration of $7.1 million was allocated to the purchase of the conversion option embedded in the 2.5% Convertible Senior Notes as included in the accompanying condensed consolidated statements of changes in equity. The outstanding principal amount of these notes was $167.1 million as of September 30, 2016 . 7.375% Senior Notes. During the nine months ended September 30, 2016 , the Company purchased $22.6 million in principal amount of its 7.375% Senior Notes for $20.3 million resulting in gains on debt extinguishment of $2.1 million included in the accompanying condensed consolidated statements of income (loss). The outstanding principal amount of these notes was $173.4 million as of September 30, 2016 . Windcat Workboats Credit Facility. On May 24, 2016, Windcat Workboats entered into a €25.0 million revolving credit facility secured by the Company’s wind farm utility vessel fleet. Borrowings under the facility bear interest at variable rates based on EURIBOR plus a margin ranging from 3.00% to 3.30% per annum plus mandatory lender costs. A quarterly commitment fee is payable based on the unfunded portion of the commitment amount at rates ranging from 1.20% to 1.32% per annum. During the nine months ended September 30, 2016 , Windcat Workboats drew $23.5 million ( €21.0 million ) under the facility to repay all of its then outstanding debt totaling $22.9 million and incurred issuance costs of $0.6 million related to this facility. Sea-Cat Crewzer III Term Loan Facility. On April 21, 2016, Sea-Cat Crewzer III LLC (“Sea-Cat Crewzer III”) entered into a €27.6 million term loan facility (payable in U.S. dollars) secured by the Company’s vessels currently under construction. Borrowings under the facility bear interest at a Commercial Interest Reference Rate, currently 2.76% . A quarterly commitment fee is payable based on the unfunded portion of the commitment amount at a rate of 0.45% . During the nine months ended September 30, 2016 , Sea-Cat Crewzer III drew $16.1 million under the facility and incurred issuance costs of $2.6 million . SEA-Vista Credit Facility. During the nine months ended September 30, 2016 , SEA-Vista borrowed $71.0 million on the Revolving Loan and made scheduled repayments of $2.9 million on the Term A-1 Loan. As of September 30, 2016 , SEA-Vista had $16.0 million of borrowing capacity under the SEA-Vista Credit Facility. Subsequent to September 30, 2016 , SEA-Vista borrowed $5.0 million on the Revolving Loan. ICP Revolving Credit Facility. As of September 30, 2016 , ICP had $15.9 million of borrowing capacity under this facility. Other. During the nine months ended September 30, 2016 , the Company made scheduled payments on other long-term debt of $2.5 million and received proceeds from the issuance of other long-term debt of $7.5 million , net of issuance costs of $0.1 million . As of September 30, 2016 , the Company had outstanding letters of credit totaling $26.2 million with various expiration dates through 2019 and other labor and performance guarantees of $1.6 million .

Derivative Instruments And Hedg

Derivative Instruments And Hedging Strategies	9 Months Ended
Derivative Instruments And Hedging Strategies	Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments And Hedging Strategies	DERIVATIVE INSTRUMENTS AND HEDGING STRATEGIES Derivative instruments are classified as either assets or liabilities based on their individual fair values. The fair values of the Company’s derivative instruments as of September 30, 2016 were as follows (in thousands): Derivative Asset (1) Derivative Liability (2) Derivatives designated as hedging instruments: Forward currency exchange contracts (fair value hedges) $ — $ 150 Interest rate swap agreements (cash flow hedges) — 229 Derivatives not designated as hedging instruments: Exchange option liability on subsidiary convertible senior notes — 8,938 Forward currency exchange, option and future contracts — 102 Exchange traded commodity swap, option and future contracts 51 1,479 $ 51 $ 10,898 ______________________ (1) Included in other receivables in the accompanying condensed consolidated balance sheets. (2) Included in other current liabilities in the accompanying condensed consolidated balance sheets, except for the exchange option liability on subsidiary convertible senior notes. Fair Value Hedges. From time to time, the Company may designate certain of its foreign currency exchange contracts as fair value hedges in respect of capital commitments denominated in foreign currencies. By entering into these foreign currency exchange contracts, the Company may fix a portion of its capital commitments denominated in foreign currencies in U.S. dollars to protect against currency fluctuations. As of September 30, 2016 , the Company had euro denominated forward currency exchange contracts with an aggregate U.S. dollar equivalent of $9.7 million related to offshore support vessels scheduled to be delivered in 2017. During the nine months ended September 30, 2016 , the fair value of these contracts decreased by $0.2 million and was included as an increase to the corresponding hedged equipment included in construction in progress in the accompanying condensed consolidated balance sheets. Cash Flow Hedges. The Company and certain of the Company’s 50% or less owned companies have interest rate swap agreements designated as cash flow hedges. By entering into these interest rate swap agreements, these companies have converted the variable LIBOR or EURIBOR component of certain of their outstanding borrowings to a fixed interest rate. The Company recognized losses on derivative instruments designated as cash flow hedges of $3.9 million and $2.2 million for the nine months ended September 30, 2016 and 2015 , respectively, as a component of other comprehensive income (loss). As of September 30, 2016 , the interest rate swaps held by the Company and the Company’s 50% or less owned companies were as follows: • The Company had two interest rate swap agreements maturing in 2021 that call for the Company to pay a fixed rate of interest of (0.03)% on the aggregate notional value of €15.0 million ( $16.9 million ) and receive a variable interest rate based on EURIBOR on the aggregate notional value. • MexMar had four interest rate swap agreements with maturities in 2023 that call for MexMar to pay a fixed rate of interest ranging from 1.71% to 2.05% on the aggregate amortized notional value of $108.6 million and receive a variable interest rate based on LIBOR on the aggregate amortized notional value. • Sea-Cat Crewzer II had an interest rate swap agreement maturing in 2019 that calls for Sea-Cat Crewzer II to pay a fixed rate of interest of 1.52% on the amortized notional value of $23.9 million and receive a variable interest rate based on LIBOR on the amortized notional value. • Sea-Cat Crewzer had an interest rate swap agreement maturing in 2019 that calls for Sea-Cat Crewzer to pay a fixed rate of interest of 1.52% on the amortized notional value of $21.1 million and receive a variable interest rate based on LIBOR on the amortized notional value. • SeaJon had an interest rate swap agreement maturing in 2017 that calls for SeaJon to pay a fixed interest rate of 2.79% on the amortized notional value of $30.9 million and receive a variable interest rate based on LIBOR on the amortized notional value. Other Derivative Instruments. The Company recognized gains (losses) on derivative instruments not designated as hedging instruments for the nine months ended September 30, 2016 as follows (in thousands): 2016 2015 Exchange option liability on subsidiary convertible senior notes $ (3,328 ) $ — Options on equities and equity indices 3,095 (699 ) Forward currency exchange, option and future contracts (186 ) (474 ) Interest rate swap agreements (18 ) (15 ) Commodity swap, option and future contracts: Exchange traded 328 (2,606 ) Non-exchange traded — 1,499 $ (109 ) $ (2,295 ) The exchange option liability relates to a bifurcated embedded derivative in the Company’s 3.75% Subsidiary Convertible Senior Notes. The Company holds positions in publicly traded equity options that convey the right or obligation to engage in future transactions in the underlying equity security or index. The Company’s investment in equity options primarily includes positions in energy, marine, transportation and other related businesses. These contracts are typically entered into to mitigate the risk of changes in the market value of marketable security positions that the Company is either about to acquire, has acquired or is about to dispose. The Company enters and settles forward currency exchange, option and future contracts with respect to various foreign currencies. As of September 30, 2016 , the outstanding forward currency exchange contracts translated into a net purchase of foreign currencies with an aggregate U.S. dollar equivalent of $2.1 million . These contracts enable the Company to buy currencies in the future at fixed exchange rates, which could offset possible consequences of changes in currency exchange rates with respect to the Company’s business conducted outside of the United States. The Company generally does not enter into contracts with forward settlement dates beyond twelve to eighteen months. The Company and certain of its 50% or less owned companies have entered into interest rate swap agreements for the general purpose of providing protection against increases in interest rates, which might lead to higher interest costs. As of September 30, 2016 , the interest rate swaps held by the Company or its 50% or less owned companies were as follows: • OSV Partners had two interest rate swap agreements with maturities in 2020 that call for OSV Partners to pay a fixed rate of interest ranging from 1.89% to 2.27% on the aggregate amortized notional value of $39.3 million and receive a variable interest rate based on LIBOR on the aggregate amortized notional value. • Dynamic Offshore had an interest rate swap agreement maturing in 2018 that calls for Dynamic Offshore to pay a fixed interest rate of 1.30% on the amortized notional value of $76.4 million and receive a variable interest rate based on LIBOR on the amortized notional value. • Falcon Global had an interest rate swap agreement maturing in 2022 that calls for Falcon Global to pay a fixed interest rate of 2.06% on the amortized notional value of $62.5 million and receive a variable interest rate based on LIBOR on the amortized notional value. The Company and certain of its 50% or less owned companies enter and settle positions in various exchange and non-exchange traded commodity swap, option and future contracts. ICP enters into exchange traded positions (primarily corn, ethanol and natural gas) to protect its raw material and finished goods inventory balances from market changes. VA&E enters into exchange traded positions to protect its fixed price future purchase and sale contracts for sugar as well as its inventory balances from market changes. As of September 30, 2016 , the net market exposure to these commodities under these contracts was not material.
Fair Values Of Derivative Instruments	Derivative instruments are classified as either assets or liabilities based on their individual fair values. The fair values of the Company’s derivative instruments as of September 30, 2016 were as follows (in thousands): Derivative Asset (1) Derivative Liability (2) Derivatives designated as hedging instruments: Forward currency exchange contracts (fair value hedges) $ — $ 150 Interest rate swap agreements (cash flow hedges) — 229 Derivatives not designated as hedging instruments: Exchange option liability on subsidiary convertible senior notes — 8,938 Forward currency exchange, option and future contracts — 102 Exchange traded commodity swap, option and future contracts 51 1,479 $ 51 $ 10,898 ______________________ (1) Included in other receivables in the accompanying condensed consolidated balance sheets. (2) Included in other current liabilities in the accompanying condensed consolidated balance sheets, except for the exchange option liability on subsidiary convertible senior notes.

Stock Repurchases

Stock Repurchases	9 Months Ended
Stock Repurchases	Sep. 30, 2016
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Stock Repurchases	STOCK REPURCHASES SEACOR’s Board of Directors previously approved a securities repurchase plan that authorizes the Company to acquire its Securities through open market purchases, privately negotiated transactions or otherwise, depending on market conditions. As of September 30, 2016 , the Company’s repurchase authority for the Securities was $64.8 million . During the nine months ended September 30, 2016 , the Company purchased 47,455 shares of Common Stock for treasury for an aggregate purchase price of $2.4 million from its employees to cover their tax withholding obligations upon the lapsing of restrictions on share awards. These shares were purchased in accordance with the terms of the Company’s Share Incentive Plans and not pursuant to the repurchase authorization granted by SEACOR’s Board of Directors.

Noncontrolling Interests in Sub

Noncontrolling Interests in Subsidiaries (Notes)	9 Months Ended
Noncontrolling Interests in Subsidiaries (Notes)	Sep. 30, 2016
Noncontrolling Interest [Abstract]
Noncontrolling Interests in Subsidiaries Disclosure [Text Block]	NONCONTROLLING INTERESTS IN SUBSIDIARIES Noncontrolling interests in the Company’s consolidated subsidiaries were as follows (in thousands): Noncontrolling Interests September 30, 2016 December 31, 2015 Offshore Marine Services: Windcat Workboats 25% $ 5,730 $ 7,484 Other 1.8 % – 30% 265 470 Inland River Services: Other 3.0 % – 51.8% 953 1,146 Shipping Services: Sea-Vista 49% 104,182 88,290 Illinois Corn Processing 30% 20,942 22,272 Other 5.0 % – 14.6% 152 457 $ 132,224 $ 120,119 Windcat Workboats. Windcat Workboats owns and operates the Company’s wind farm utility vessels that are primarily used to move personnel and supplies in the major offshore wind markets of Europe. As of September 30, 2016 , the net assets of Windcat Workboats were $22.9 million . During the nine months ended September 30, 2016 , the net loss of Windcat Workboats was $3.6 million , of which $0.9 million was attributable to noncontrolling interests. During the nine months ended September 30, 2015 , the net income of Windcat Workboats was $3.4 million , of which $0.9 million was attributable to noncontrolling interests. SEA-Vista. SEA-Vista owns and operates the Company’s fleet of U.S.-flag product tankers used in the U.S. coastwise trade of crude oil, petroleum and specialty chemical products. As of September 30, 2016 , the net assets of SEA-Vista were $212.6 million . During the nine months ended September 30, 2016 , the net income of SEA-Vista was $32.4 million , of which $15.9 million was attributable to noncontrolling interests. During the nine months ended September 30, 2015 , the net loss of SEA-Vista was $9.6 million , of which $4.7 million was attributable to noncontrolling interests. Illinois Corn Processing. ICP owns and operates an alcohol manufacturing, storage and distribution facility located in Pekin, IL. As of September 30, 2016 , the net assets of ICP were $69.8 million . During the nine months ended September 30, 2016 , the net income of ICP was $6.6 million , of which $2.0 million was attributable to noncontrolling interests. During the nine months ended September 30, 2015 , the net income of ICP was $19.4 million , of which $5.8 million was attributable to noncontrolling interests.

Multiemployer Pension Plans

Multiemployer Pension Plans	9 Months Ended
Multiemployer Pension Plans	Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Multiemployer Pension Plans	MULTI-EMPLOYER PENSION PLANS AMOPP. During the nine months ended September 30, 2016 , the Company received notification from the AMOPP that the Company’s withdrawal liability as of September 30, 2015 was $46.7 million based on an actuarial valuation performed as of that date. That liability may change in future years based on various factors, primarily employee census. As of September 30, 2016 , the Company has no intention to withdraw from the AMOPP and no deficit amounts have been invoiced. Depending upon the results of the future actuarial valuations and the ten-year rehabilitation plan, it is possible that the AMOPP will experience further funding deficits, requiring the Company to recognize additional payroll related operating expenses in the periods invoices are received or contribution levels are increased.

Share Based Compensation

Share Based Compensation	9 Months Ended
Share Based Compensation	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share Based Compensation	SHARE BASED COMPENSATION Transactions in connection with the Company’s share based compensation plans during the nine months ended September 30, 2016 were as follows: Director stock awards granted 2,375 Employee Stock Purchase Plan (“ESPP”) shares issued 41,924 Restricted stock awards granted 137,258 Restricted stock awards canceled 2,867 Stock Option Activities: Outstanding as of December 31, 2015 1,690,899 Granted 153,073 Exercised (49,618 ) Forfeited (18,760 ) Expired (116,004 ) Outstanding as of September 30, 2016 1,659,590 Shares available for future grants and ESPP purchases as of September 30, 2016 567,568

Commitments And Contingencies

Commitments And Contingencies	9 Months Ended
Commitments And Contingencies	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES The Company's capital commitments as of September 30, 2016 by year of expected payment were as follows (in thousands): 2016 2017 2018 2019 Total Offshore Marine Services $ 12,622 $ 38,366 $ 47,374 $ 12,554 $ 110,916 Shipping Services 43,482 26,096 — — 69,578 Inland River Services 17,572 27,465 — — 45,037 Illinois Corn Processing 1,287 — — — 1,287 $ 74,963 $ 91,927 $ 47,374 $ 12,554 $ 226,818 Offshore Marine Services' capital commitments included nine fast support vessels, four supply vessels and one wind farm utility vessel. These commitments included $15.4 million for one supply vessel that may be assumed by a third party at their option. Shipping Services’ capital commitments included two U.S.-flag product tankers, one U.S.-flag chemical and petroleum articulated tug-barge and two U.S.-flag harbor tugs and other equipment and upgrades. Inland River Services’ capital commitments included 38 dry-cargo barges, three inland river towboats and other equipment and upgrades. Subsequent to September 30, 2016 , the Company committed to purchase other equipment for $18.0 million . On December 15, 2010, both ORM and NRC, a subsidiary of the Company prior to the SES Business Transaction were named as defendants in one of the several “master complaints” filed in the overall multi-district litigation relating to the Deepwater Horizon oil spill response and clean-up in the Gulf of Mexico pending in the U.S. District Court for the Eastern District of Louisiana (the “MDL”). The “B3” master complaint naming ORM and NRC asserts various claims on behalf of a putative class against multiple defendants concerning the clean-up activities generally and the use of dispersants specifically. Both prior to and following the filing of the aforementioned master complaint, individual civil actions naming the Company, ORM, and/or NRC alleging B3 exposure-based injuries and/or damages were consolidated with the MDL and stayed pursuant to court order, discussed in turn below. The Company has continually taken the position that all of the B3 claims asserted against ORM and NRC have no merit, and on February 28, 2011, ORM and NRC moved to dismiss all claims asserted against them in the master complaint. On September 30, 2011, the Court granted in part and denied in part the motion to dismiss that ORM and NRC had filed, although the Court recognized the validity of the derivative immunity and implied preemption arguments that ORM and NRC advanced in their motion and directed ORM and NRC to (i) conduct limited discovery to develop evidence to support those arguments and (ii) then re-assert those arguments. A schedule for limited discovery and motion practice was established by the Court and, in accordance with that schedule, ORM and NRC filed for summary judgment re-asserting their immunity and preemption arguments on May 18, 2012. Those motions were argued on July 13, 2012 and taken under advisement. On July 17, 2014, the Court issued a pretrial order that established a protocol for disclosures clarifying the basis for the B3 claims asserted against the Clean-Up Responder Defendants, including ORM and NRC, in the MDL, whether by joinder in the master complaint, individual complaint or otherwise. Under this protocol, plaintiffs who satisfied certain criteria and believed they had specific evidence in support of their claims, including that any Clean-Up Responder Defendant(s) failed to act pursuant to the authority and direction of the federal government in conducting Deepwater Horizon oil spill remediation and clean-up operations, had to submit a sworn statement or face dismissal. Plaintiffs’ deadline to serve such sworn statements in support of their claims was September 22, 2014, with the exception of several Plaintiffs who were granted an extension until October 10, 2014. On November 14, 2014, the Clean-Up Responder Defendants and the Plaintiffs’ Steering Committee (“PSC”) in the MDL submitted a joint report to the Court regarding claimants’ compliance with the pretrial order. In this joint report, the parties (i) explained how they complied with the notice requirements of the Court’s July 17, 2014 pretrial order, (ii) noted that they had received 102 sworn statements in connection with this pretrial order, and (iii) provided the Court with an assessment of the sworn statements received. An additional sworn statement was received after the joint report was submitted. On January 7, 2016, the Court issued an Order to Show Cause (“OSC”) as to the B3 claims against the Clean-Up Responder Defendants, including ORM and NRC. The OSC ordered any plaintiff(s) opposed to the Court entering the proposed Order & Reasons (“O&R”) attached to the OSC to show cause, in writing, on or before January 28, 2016 why the Court should not dismiss their B3 claim(s) with prejudice for the reasons set forth in the O&R. The O&R addressed the pending summary judgment motions and stated, among other things, why the Clean-Up Responder Defendants are entitled to derivative immunity under the Clean Water Act and discretionary function immunity under the Federal Tort Claims Act, and why Plaintiffs’ claims are preempted by the implied conflict preemption doctrine. The O&R also discussed the results of the protocol delineated in the Court’s July 17, 2014 pretrial order and concluded with the dismissal of all but eleven Plaintiffs’ B3 claims against the Clean-Up Responder Defendants with prejudice. Eight individual Plaintiffs submitted responses to the OSC by the January 28, 2016 deadline, and the Clean-Up Responder Defendants submitted a response thereto on February 4, 2016. On February 16, 2016, the Court issued an order overruling the objections relayed in the eight individual Plaintiffs’ responses to the OSC, and then entered a dismissal order nearly identical to the O&R. Accordingly, the final Order & Reasons entered on February 16, 2016 dismissed all but eleven B3 claims against ORM and NRC with prejudice, whether by joinder in the master complaint, individual complaint, or otherwise (the “B3 Dismissal Order”). The deadline for Plaintiffs to appeal the B3 Dismissal Order has passed and the Company continues to evaluate how this ruling will impact the individual civil actions. Moreover, on April 8, 2016, the Court entered an order establishing a summary judgment briefing schedule as to the remaining eleven B3 claimants (the “Remaining Eleven Plaintiffs”). The Clean-Up Responder Defendants, including ORM and NRC, filed an omnibus motion for summary judgment as to the Remaining Eleven Plaintiffs on May 9, 2016. Following briefing by the parties, on August 2, 2016, the Court granted the omnibus motion as it concerns ORM and NRC in its entirety, dismissing the Remaining Eleven Plaintiffs’ against ORM and NRC with prejudice (the “Remaining Eleven Plaintiffs’ Dismissal Order”). To date, no appeal has been filed. In addition to the indemnity provided to ORM, pursuant to contractual agreements with the responsible party, the responsible party has agreed, subject to certain potential limitations, to indemnify and defend ORM and NRC in connection with the B3 claims in the MDL. Although the Company is unable to estimate the potential exposure, if any, resulting from the remaining B3 claims, the Company does not expect they will have a material effect on the Company’s consolidated financial position, results of operations or cash flows. As noted above, various civil actions concerning the Deepwater Horizon clean-up have been consolidated with the MDL and stayed. However, as discussed further below, the individual B3 exposure-based claims asserted against ORM and/or NRC have been dismissed pursuant to the B3 Dismissal Order or the Remaining Eleven Plaintiffs’ Dismissal Order. On July 20, 2010, two individuals purporting to represent a class commenced a civil action in the Civil District Court for the Parish of Orleans in the State of Louisiana, John Wunstell, Jr. and Kelly Blanchard v. BP, et al. , No. 2010-7437 (Division K) (the “ Wunstell Action”), in which they assert, among other theories, that Mr. Wunstell suffered injuries as a result of his exposure to certain noxious fumes and chemicals in connection with the provision of remediation, containment, and response services by ORM during the Deepwater Horizon oil spill response and clean-up in the U.S. Gulf of Mexico. Mr. Wunstell is one of the Remaining Eleven Plaintiffs and his claim was dismissed by virtue of the Remaining Eleven Plaintiffs’ Dismissal Order; Ms. Blanchard’s B3 claim against ORM was dismissed by virtue of the B3 Dismissal Order. On April 8, 2011, ORM was named as a defendant in Johnson Bros. Corporation of Louisiana v. BP, PLC, et al. , No. 2:11-CV-00781 (E.D. La.), which is a suit by an individual business seeking damages allegedly caused by a delay on a construction project alleged to have resulted from the clean-up operations. On April 15, 2011, ORM and NRC were named as defendants in Thomas Edward Black v. BP Exploration, et al. , No. 2:11-CV-00867 (E.D. La.) (the “ Black Action”), which is a suit by an individual who is seeking damages for, among other things, lost income because he allegedly could not find work in the fishing industry after the oil spill and exposure during the spill. The B3 exposure claims against ORM and NRC in the Black Action have been dismissed by virtue of the B3 Dismissal Order. On October 3, 2012, ORM and NRC were served with a Rule 14(c) Third-Party Complaint by Jambon Supplier II, L.L.C. and Jambon Marine Holdings L.L.C. in their Limitation of Liability action, In the Matter of Jambon Supplier II, L.L.C., et al. , No. 2:12-CV-00426 (E.D. La.). This Third-Party Complaint alleges that if claimant David Dinwiddie, who served as a clean-up crewmember aboard the M/V JAMBON SUPPLIER II vessel during the clean-up efforts, was injured as a result of his exposure to dispersants and chemicals during the course and scope of his employment, then said injuries were caused by the third-party defendants. On November 25, 2012, ORM was named as a defendant in Victoria Sanchez v. American Pollution Control Corp. et al. , No. 2:12-CV-00164 (E.D. La.), a maritime suit filed by an individual who allegedly participated in the clean-up effort and sustained personal injuries during the course of such employment. Ms. Sanchez’s B3 claim against ORM has been dismissed by virtue of the B3 Dismissal Order. On December 17, 2012, the Court unsealed a False Claims Act lawsuit naming ORM as a defendant, Dillon v. BP, PLC et al. , No. 2:12-CV-00987 (E.D. La.), which is a suit by an individual seeking damages and penalties arising from alleged false reports and claims made to the federal government with respect to the amount of oil burned and dispersed during the clean-up. The federal government has declined to intervene in this suit. On April 8, 2013, the Company, ORM, and NRC were named as defendants in William and Dianna Fitzgerald v. BP Exploration et al. , No. 2:13-CV-00650 (E.D. La.) (the “ Fitzgerald Action”), which is a suit by a husband and wife whose son allegedly participated in the clean-up effort and became ill as a result of his exposure to oil and dispersants. While the decedent in the Fitzgerald Action’s claims against ORM and NRC were dismisses by virtue of the Remaining Eleven Plaintiffs’ Dismissal Order, the claim as against the Company remains stayed. Finally, on April 17, 2013, ORM was named as a defendant in Danos et al. v. BP America Production Co. et al. , No. 2:13-CV-03747 (removed to E.D. La.) (the “ Danos Action”), which is a suit by eight individuals seeking damages for dispersant exposure either as a result of their work during clean-up operations or as a result of their residence in the Gulf. The claims asserted by Messrs. Jorey Danos and Frank Howell, two plaintiffs in the Danos Action were dismissed by virtue of the Remaining Eleven Plaintiffs’ Dismissal Order; the other Danos Action plaintiffs’ B3 claims against ORM were previously dismissed by virtue of the B3 Dismissal Order. The Company continues to evaluate the impact of the B3 Dismissal Order, the Remaining Eleven Plaintiffs’ Dismissal Order, and other developments in the MDL, including the settlements discussed below, on these individual actions. The Company is unable to estimate the potential exposure, if any, resulting from these matters, to the extent they remain viable, but believes they are without merit and does not expect that they will have a material effect on its consolidated financial position, results of operations or cash flows. On February 18, 2011, Triton Asset Leasing GmbH, Transocean Holdings LLC, Transocean Offshore Deepwater Drilling Inc., and Transocean Deepwater Inc. (collectively “Transocean”) named ORM and NRC as third-party defendants in a Rule 14(c) Third-Party Complaint in Transocean's own Limitation of Liability Act action, which is part of the overall MDL, tendering to ORM and NRC the claims in the referenced master complaint that have already been asserted against ORM and NRC. Transocean, Cameron International Corporation (“Cameron”), Halliburton Energy Services, Inc., and M-I L.L.C. (“M-I”) also filed cross-claims against ORM and NRC for contribution and tort indemnity should they be found liable for any damages in Transocean's Limitation of Liability Act action and ORM and NRC asserted counterclaims against those same parties for identical relief. The remainder of the aforementioned cross-claims in Transocean's limitation action remain pending, although the Court has found Cameron and M-I to be not liable in connection with the Deepwater Horizon incident and resultant oil spill and dismissed these parties from the MDL. As indicated above, the Company is unable to estimate the potential exposure, if any, resulting from these actions but believes they are without merit and does not expect that these matters will have a material effect on its consolidated financial position, results of operations or cash flows. On November 16, 2012, 668 individuals who served as beach clean-up workers in Escambia County, Florida during the Deepwater Horizon oil spill response commenced a civil action in the Circuit Court for the First Judicial Circuit of Florida, in and for Escambia County, Abney et al. v. Plant Performance Services, LLC et al. , No. 2012-CA-002947, in which they allege, among other things, that ORM and other defendants engaged in the contamination of Florida waters and beaches in violation of Florida Statutes Chapter 376 and injured the Plaintiffs by exposing them to dispersants during the course and scope of their employment. This case was removed to federal court and ultimately consolidated with the MDL on April 2, 2013. On April 22, 2013, a companion case to this matter was filed in the U.S. District Court for the Northern District of Florida, Abood et al. v. Plant Performance Services, LLC et al. , No. 3:13-CV-00284 (N.D. Fla.), which alleges identical allegations against the same parties but names an additional 174 Plaintiffs, all of whom served as clean-up workers in various Florida counties during the Deepwater Horizon oil spill response. This case was consolidated with the MDL on May 10, 2013. By court order, both of these matters have been stayed since they were consolidated with the MDL. The Company continues to evaluate the impact of the developments in the MDL, including the settlements discussed below, on these cases, but believes that the potential exposure, if any, resulting from these matters has been reduced as a result of the B3 Dismissal Order and does not expect that these matters will have a material effect on its consolidated financial position, results of operations or cash flows. Separately, on March 2, 2012, the Court announced that BP Exploration and BP America Production Company (“BP America”) (collectively “BP”) and the Plaintiffs had reached an agreement on the terms of two proposed class action settlements that will resolve, among other things, Plaintiffs’ economic loss claims and clean-up related claims against BP. Both settlements were granted final approval by the Court, all appeals have concluded, and the deadline for submitting claims with respect to both settlements has passed. Although neither the Company, ORM, nor NRC are parties to the settlement agreements, the Company, ORM, and NRC are listed as released parties on the releases accompanying both settlement agreements. Consequently, class members who did not file timely requests for exclusion will be barred from pursuing economic loss, property damage, personal injury, medical monitoring, and/or other released claims against the Company, ORM, and NRC. The Company believes these settlements have reduced the potential exposure, if any, from some of the pending actions described above, and continues to evaluate the settlements’ impacts on these cases. In the course of the Company’s business, it may agree to indemnify the counterparty to an agreement. If the indemnified party makes a successful claim for indemnification, the Company would be required to reimburse that party in accordance with the terms of the indemnification agreement. Indemnification agreements generally are subject to threshold amounts, specified claim periods and other restrictions and limitations. In connection with the SES Business Transaction, the Company remains contingently liable for certain obligations, including potential liabilities relating to work performed in connection with the Deepwater Horizon oil spill response. Pursuant to the agreement governing the sale, the Company’s potential liability to the purchaser may not exceed the consideration received by the Company for the SES Business Transaction. The Company is currently indemnified under contractual agreements with BP for the potential liabilities relating to work performed in connection with the Deepwater Horizon oil spill response. In the normal course of its business, the Company becomes involved in various other litigation matters including, among other things, claims by third parties for alleged property damages and personal injuries. Management has used estimates in determining the Company’s potential exposure to these matters and has recorded reserves in its financial statements related thereto where appropriate. It is possible that a change in the Company’s estimates of that exposure could occur, but the Company does not expect such changes in estimated costs would have a material effect on the Company’s consolidated financial position, results of operations or cash flows.

Segment Information

Segment Information	9 Months Ended
Segment Information	Sep. 30, 2016
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION The Company’s segment presentation and basis of measurement of segment profit or loss are as previously described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 . The following tables summarize the operating results, capital expenditures and assets of the Company’s reportable segments. Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the three months ended September 30, 2016 Operating Revenues: External customers 54,101 40,387 57,350 44,019 11,126 — 206,983 Intersegment 24 707 — — 20 (751 ) — 54,125 41,094 57,350 44,019 11,146 (751 ) 206,983 Costs and Expenses: Operating 41,159 31,496 28,542 39,879 6,618 (898 ) 146,796 Administrative and general 10,588 3,982 6,675 750 3,833 6,417 32,245 Depreciation and amortization 14,213 6,308 8,216 1,055 432 908 31,132 65,960 41,786 43,433 41,684 10,883 6,427 210,173 Gains (Losses) on Asset Dispositions and Impairments, Net (29,233 ) (597 ) 3 — 1 — (29,826 ) Operating Income (Loss) (41,068 ) (1,289 ) 13,920 2,335 264 (7,178 ) (33,016 ) Other Income (Expense): Derivative gains (losses), net 16 — — (328 ) — (862 ) (1,174 ) Foreign currency gains (losses), net (1,084 ) 410 (3 ) — (25 ) 36 (666 ) Other, net 1 (1 ) (5,534 ) — — 74 (5,460 ) Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 790 (171 ) (551 ) — (390 ) — (322 ) Segment Profit (Loss) (41,345 ) (1,051 ) 7,832 2,007 (151 ) Other Income (Expense) not included in Segment Profit (Loss) (14,535 ) Less Equity Losses included in Segment Profit (Loss) 322 Loss Before Taxes and Equity Losses (54,851 ) Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP (1)(2) $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the nine months ended September 30, 2016 Operating Revenues: External customers 171,198 112,814 170,025 134,204 29,708 — 617,949 Intersegment 77 1,708 — — 118 (1,903 ) — 171,275 114,522 170,025 134,204 29,826 (1,903 ) 617,949 Costs and Expenses: Operating 134,254 89,060 86,045 122,321 18,850 (2,384 ) 448,146 Administrative and general 34,915 11,671 20,930 2,318 11,705 20,585 102,124 Depreciation and amortization 44,305 19,699 22,193 3,172 1,335 2,778 93,482 213,474 120,430 129,168 127,811 31,890 20,979 643,752 Gains (Losses) on Asset Dispositions and Impairments, Net (49,970 ) 2,588 3 — (1 ) — (47,380 ) Operating Income (Loss) (92,169 ) (3,320 ) 40,860 6,393 (2,065 ) (22,882 ) (73,183 ) Other Income (Expense): Derivative gains (losses), net 3,077 — — 341 — (3,527 ) (109 ) Foreign currency gains (losses), net (3,463 ) 2,865 (12 ) — (125 ) 84 (651 ) Other, net 266 (5 ) (6,461 ) — (6,723 ) 79 (12,844 ) Equity in Losses of 50% or Less Owned Companies, Net of Tax (364 ) (4,626 ) (2,116 ) — (427 ) — (7,533 ) Segment Profit (Loss) (92,653 ) (5,086 ) 32,271 6,734 (9,340 ) Other Income (Expense) not included in Segment Profit (Loss) (72,900 ) Less Equity Losses included in Segment Profit (Loss) 7,533 Loss Before Taxes and Equity Losses (159,687 ) Capital Expenditures 82,806 17,629 189,988 3,484 — 208 294,115 As of September 30, 2016 Property and Equipment: Historical cost 1,058,048 392,698 592,132 51,592 2,829 30,711 2,128,010 Accumulated depreciation (552,018 ) (161,023 ) (253,116 ) (22,562 ) (2,483 ) (17,427 ) (1,008,629 ) 506,030 231,675 339,016 29,030 346 13,284 1,119,381 Construction in progress 122,633 9,948 328,692 4,578 — (1,191 ) 464,660 Net property and equipment 628,663 241,623 667,708 33,608 346 12,093 1,584,041 Investments, at Equity, and Advances to 50% or Less Owned Companies 133,011 80,004 57,366 — 60,682 — 331,063 Inventories 3,165 2,033 952 9,660 237 — 16,047 Goodwill — 2,427 1,852 — 48,124 — 52,403 Intangible Assets — 5,295 — — 18,201 — 23,496 Other current and long-term assets, excluding cash and near cash assets (3) 103,698 55,710 27,508 11,949 28,708 4,384 231,957 Segment Assets 868,537 387,092 755,386 55,217 156,298 Cash and near cash assets (3) 715,126 Total Assets 2,954,133 ______________________ (1) Operating revenues includes $126.5 million of tangible product sales and operating expenses includes $114.6 million of costs of goods sold. (2) Inventories includes raw materials of $1.9 million and work in process of $1.4 million . (3) Cash and near cash assets includes cash, cash equivalents, restricted cash, marketable securities and construction reserve funds. Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the three months ended September 30, 2015 Operating Revenues: External customers 95,503 53,617 58,673 40,282 13,777 — 261,852 Intersegment 28 693 — — 2 (723 ) — 95,531 54,310 58,673 40,282 13,779 (723 ) 261,852 Costs and Expenses: Operating 70,221 39,487 27,666 33,514 5,854 (757 ) 175,985 Administrative and general 12,753 3,907 6,236 543 6,658 7,795 37,892 Depreciation and amortization 15,252 7,268 6,476 979 152 891 31,018 98,226 50,662 40,378 35,036 12,664 7,929 244,895 Gains (Losses) on Asset Dispositions, Net (246 ) 11,510 — — — — 11,264 Operating Income (Loss) (2,941 ) 15,158 18,295 5,246 1,115 (8,652 ) 28,221 Other Income (Expense): Derivative gains (losses), net (10 ) 50 — (336 ) — (429 ) (725 ) Foreign currency losses, net (1,567 ) (2,173 ) (9 ) — (64 ) (244 ) (4,057 ) Other, net (9 ) — 1,836 — (1 ) (53 ) 1,773 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 1,708 (2,117 ) 5,292 — 240 — 5,123 Segment Profit (Loss) (2,819 ) 10,918 25,414 4,910 1,290 Other Income (Expense) not included in Segment Profit (Loss) (10,867 ) Less Equity Earnings included in Segment Profit (Loss) (5,123 ) Income Before Taxes and Equity Earnings (Losses) 14,345 Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP (1)(2) $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the nine months ended September 30, 2015 Operating Revenues: External customers 285,613 169,996 165,754 128,251 54,491 — 804,105 Intersegment 89 2,071 — — 77 (2,237 ) — 285,702 172,067 165,754 128,251 54,568 (2,237 ) 804,105 Costs and Expenses: Operating 216,749 129,556 100,921 107,220 30,787 (2,357 ) 582,876 Administrative and general 38,967 11,556 19,201 1,614 20,411 23,704 115,453 Depreciation and amortization 46,310 21,519 19,822 2,938 1,141 2,797 94,527 302,026 162,631 139,944 111,772 52,339 24,144 792,856 Gains (Losses) on Asset Dispositions and Impairments, Net (3,440 ) 14,479 — — (235 ) — 10,804 Operating Income (Loss) (19,764 ) 23,915 25,810 16,479 1,994 (26,381 ) 22,053 Other Income (Expense): Derivative gains (losses), net (15 ) 309 — (1,114 ) (472 ) (1,003 ) (2,295 ) Foreign currency gains (losses), net 323 (3,086 ) (12 ) — (68 ) (771 ) (3,614 ) Other, net (112 ) — 2,052 4,112 47 63 6,162 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 7,509 (6,108 ) 8,796 — (111 ) — 10,086 Segment Profit (Loss) (12,059 ) 15,030 36,646 19,477 1,390 Other Income (Expense) not included in Segment Profit (Loss) (51,125 ) Less Equity Earnings included in Segment Profit (Loss) (10,086 ) Loss Before Taxes and Equity Earnings (Losses) (28,819 ) Capital Expenditures 67,126 66,604 89,015 3,983 41 475 227,244 As of September 30, 2015 Property and Equipment: Historical cost 1,087,471 477,163 454,095 47,256 3,111 30,387 2,099,483 Accumulated depreciation (535,575 ) (164,485 ) (232,603 ) (18,426 ) (2,899 ) (13,733 ) (967,721 ) 551,896 312,678 221,492 28,830 212 16,654 1,131,762 Construction in progress 95,556 23,208 289,714 4,701 — 393 413,572 Net property and equipment 647,452 335,886 511,206 33,531 212 17,047 1,545,334 Investments, at Equity, and Advances to 50% or Less Owned Companies 128,748 102,732 211,017 — 48,321 — 490,818 Inventories 4,837 2,165 719 15,553 — — 23,274 Goodwill 13,367 2,382 1,852 — 48,124 — 65,725 Intangible Assets 1,081 6,191 — — 19,907 — 27,179 Other current and long-term assets, excluding cash and near cash assets (3) 101,254 77,563 31,000 11,125 47,376 4,472 272,790 Segment Assets 896,739 526,919 755,794 60,209 163,940 Cash and near cash assets (3) 741,907 Total Assets 3,167,027 ______________________ (1) Operating revenues includes $119.3 million of tangible product sales and operating expenses includes $98.3 million of costs of goods sold. (2) Inventories includes raw materials of $1.7 million and work in process of $1.7 million . (3) Cash and near cash assets includes cash, cash equivalents, marketable securities and construction reserve funds.

Basis of Presentation and Acc19

Basis of Presentation and Accounting Policy (Policy)	9 Months Ended
Basis of Presentation and Accounting Policy (Policy)	Sep. 30, 2016
Accounting Policies [Abstract]
Basis Of Consolidation	The condensed consolidated financial information for the three and nine months ended September 30, 2016 and 2015 has been prepared by the Company and has not been audited by its independent registered certified public accounting firm. The condensed consolidated financial statements include the accounts of SEACOR Holdings Inc. and its consolidated subsidiaries. In the opinion of management, all adjustments (consisting of normal recurring adjustments) have been made to fairly present the Company’s financial position as of September 30, 2016 , its results of operations for the three and nine months ended September 30, 2016 and 2015 , its comprehensive income (loss) for the three and nine months ended September 30, 2016 and 2015 , its changes in equity for the nine months ended September 30, 2016 , and its cash flows for the nine months ended September 30, 2016 and 2015 . Results of operations for the interim periods presented are not necessarily indicative of operating results for the full year or any future periods. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States have been condensed or omitted. These condensed consolidated financial statements should be read in conjunction with the financial statements and related notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 . Unless the context otherwise indicates, any reference in this Quarterly Report on Form 10-Q to the "Company" refers to SEACOR Holdings Inc. and its consolidated subsidiaries and any reference in this Quarterly Report on Form 10-Q to "SEACOR" refers to SEACOR Holdings Inc. Capitalized terms used and not specifically defined herein have the same meaning given those terms in the Company's Annual report on Form 10-K for the year ended December 31, 2015 .
Revenue Recognition	Revenue Recognition. The Company recognizes revenue when it is realized or realizable and earned. Revenue is realized or realizable and earned when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price to the buyer is fixed or determinable, and collectability is reasonably assured. Revenue that does not meet these criteria is deferred until the criteria are met. As of September 30, 2016 , deferred revenues of $6.8 million , included in other current liabilities in the accompanying condensed consolidated balance sheets, related to the time charter of several offshore support vessels scheduled to be paid through the conveyance of an overriding royalty interest (the “Conveyance”) in developmental oil and gas producing properties operated by a customer in the U.S. Gulf of Mexico. Payments under the Conveyance, and the timing of such payments, were contingent upon production and energy sale prices. On August 17, 2012, the customer filed a voluntary petition for Chapter 11 bankruptcy. The Company is vigorously defending its interest in connection with the bankruptcy filing; however, payments received under the Conveyance subsequent to May 19, 2012 are subject to creditors’ claims in bankruptcy court. The Company will recognize revenues when reasonably assured of a judgment in its favor. All costs and expenses related to these charters were recognized as incurred.
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment. Equipment, stated at cost, is depreciated using the straight-line method over the estimated useful life of the asset to an estimated salvage value. With respect to each class of asset, the estimated useful life is based upon a newly built asset being placed into service and represents the time period beyond which it is typically not justifiable for the Company to continue to operate the asset in the same or similar manner. From time to time, the Company may acquire older assets that have already exceeded the Company’s useful life policy, in which case the Company depreciates such assets based on its best estimate of remaining useful life, typically the next survey or certification date. As of September 30, 2016 , the estimated useful life (in years) of each of the Company’s major categories of new equipment was as follows: Offshore support vessels (excluding wind farm utility) 20 Wind farm utility vessels 10 Inland river dry-cargo barges 20 Inland river liquid tank barges 25 Inland river towboats 25 Product tankers - U.S.-flag 25 Short-sea Container/RORO (1) vessels 20 Harbor and offshore tugs 25 Ocean liquid tank barges 25 Terminal and manufacturing facilities 20 ______________________ (1) Roll on/Roll off (“RORO”). Equipment maintenance and repair costs and the costs of routine overhauls, drydockings and inspections performed on vessels and equipment are charged to operating expense as incurred. Expenditures that extend the useful life or improve the marketing and commercial characteristics of equipment as well as major renewals and improvements to other properties are capitalized. Certain interest costs incurred during the construction of equipment are capitalized as part of the assets’ carrying values and are amortized over such assets’ estimated useful lives. During the nine months ended September 30, 2016 , capitalized interest totaled $14.3 million .
Property, Plant and Equipment [Table Text Block]	As of September 30, 2016 , the estimated useful life (in years) of each of the Company’s major categories of new equipment was as follows: Offshore support vessels (excluding wind farm utility) 20 Wind farm utility vessels 10 Inland river dry-cargo barges 20 Inland river liquid tank barges 25 Inland river towboats 25 Product tankers - U.S.-flag 25 Short-sea Container/RORO (1) vessels 20 Harbor and offshore tugs 25 Ocean liquid tank barges 25 Terminal and manufacturing facilities 20 ______________________ (1) Roll on/Roll off (“RORO”).
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Impairment of Long-Lived Assets. The Company performs an impairment analysis of long-lived assets used in operations, including intangible assets, when indicators of impairment are present. These indicators may include a significant decrease in the market price of a long-lived asset or asset group, a significant adverse change in the extent or manner in which a long-lived asset or asset group is being used or in its physical condition, or a current period operating or cash flow loss combined with a history of operating or cash flow losses or a forecast that demonstrates continuing losses associated with the use of a long-lived asset or asset group. If the carrying value of the assets is not recoverable, as determined by the estimated undiscounted cash flows, the carrying value of the assets is reduced to fair value, if lower. Generally, fair value is determined using valuation techniques, such as expected discounted cash flows or appraisals, as appropriate. During the nine months ended September 30, 2016 and 2015 , the Company recognized impairment charges of $51.7 million and $6.9 million , respectively, related to long-lived assets held for use. When reviewing the Company’s Offshore Marine Services’ fleet for impairment, including stacked vessels expected to return to active service, the Company groups vessels with similar operating and marketing characteristics into vessel classes. As a result of the continued weak market conditions, the Company has identified indicators of impairment for certain of its owned offshore support vessels or vessel classes. As a consequence, the Company estimated their undiscounted future cash flows and determined that for one mini-supply vessel, one specialty vessel, 13 anchor handling towing supply vessels, eight supply vessels and 13 liftboats, there is sufficient uncertainty as to whether or not their carrying values would be recovered. During the nine months ended September 30, 2016 , the Company obtained independent appraisals and other market data resulting in impairment charges of $50.6 million related to these identified vessels and associated intangible assets. Due to limited market transactions, the primary valuation methodology applied by the appraisers was an estimated cost approach less estimated economic depreciation for comparably aged assets with a discount applied for economic obsolescence based on current and prior two years’ performance trending. The preparation of the undiscounted cash flows requires management to make certain estimates and assumptions on expected future rates per day worked and utilization levels for vessels and vessel classes over their expected remaining lives. Those estimates and assumptions are based on the projected magnitude and timing of a market recovery from offshore oil and gas exploration and production activity in the geographic regions where the Company operates and, as such, are highly subjective. If difficult market conditions persist and an anticipated recovery is delayed beyond the Company’s expectation, further deterioration in the fair value of vessels already impaired or revisions to management’s forecasts may result in the Company recording additional impairment charges related to its long-lived assets in future periods. Impairment of 50% or Less Owned Companies. Investments in 50% or less owned companies are reviewed periodically to assess whether there is an other-than-temporary decline in the fair value of the investment. The periodic assessment considers, among other things, whether the carrying value of the investment is able to be recovered and whether or not the investee’s ability to sustain an earnings capacity that would justify the carrying value of the investment. When the Company determines its investment in the 50% or less owned company is not recoverable or the decline in fair value is other-than-temporary, the investment is written down to fair value. Actual results may vary from the Company’s estimates due to the uncertainty regarding the projected financial performance of 50% or less owned companies, the severity and expected duration of declines in value, and the available liquidity in the capital markets to support the continuing operations of the 50% or less owned company. During the nine months ended September 30, 2016 , the Company recognized a $0.3 million impairment charge, net of tax, related to one of Offshore Marine Services’ equity method investments in equity in earnings (losses) of 50% or less owned companies in the accompanying condensed consolidated statements of income (loss). In addition, during the nine months ended September 30, 2016 , the Company recognized a $6.5 million impairment charge related to a Shipping Services’ cost investment in a foreign container shipping company in other, net in the accompanying condensed consolidated statements of income (loss). During the nine months ended September 30, 2015 , the Company did not recognize any impairment charges related to its 50% or less owned companies.
Deferred Gains [Policy Text Block]	Deferred Gains. The Company has sold certain equipment to its 50% or less owned companies, entered into vessel sale-leaseback transactions with finance companies, and provided seller financing on sales of its equipment to third parties and its 50% or less owned companies. A portion of the gains realized from these transactions were deferred and recorded in deferred gains and other liabilities in the accompanying condensed consolidated balance sheets. Deferred gain activity related to these transactions for the nine months ended September 30 was as follows (in thousands): 2016 2015 Balance at beginning of period $ 135,909 $ 159,911 Adjustments to deferred gains arising from asset sales 9,003 5,971 Amortization of deferred gains included in operating expenses as a reduction to rental expense (17,369 ) (16,897 ) Amortization of deferred gains included in gains (losses) on asset dispositions and impairments, net (1,852 ) (5,437 ) Other (2,850 ) (1,667 ) Balance at end of period $ 122,841 $ 141,881
Schedule Of Deferred Gain Activity [Table Text Block]	Deferred gain activity related to these transactions for the nine months ended September 30 was as follows (in thousands): 2016 2015 Balance at beginning of period $ 135,909 $ 159,911 Adjustments to deferred gains arising from asset sales 9,003 5,971 Amortization of deferred gains included in operating expenses as a reduction to rental expense (17,369 ) (16,897 ) Amortization of deferred gains included in gains (losses) on asset dispositions and impairments, net (1,852 ) (5,437 ) Other (2,850 ) (1,667 ) Balance at end of period $ 122,841 $ 141,881
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss. The components of accumulated other comprehensive loss were as follows (in thousands): SEACOR Holdings Inc. Stockholders’ Equity Noncontrolling Interests Foreign Currency Translation Adjustments Derivative Losses on Cash Flow Hedges, net Other Total Foreign Currency Translation Adjustments Derivative Losses on Cash Flow Hedges, net Other Other Comprehensive Loss December 31, 2015 $ (5,528 ) $ (116 ) $ 24 $ (5,620 ) $ (528 ) $ — $ 16 Other comprehensive loss (5,772 ) (1,680 ) (11 ) (7,463 ) (795 ) (55 ) (5 ) $ (8,318 ) Income tax benefit 2,020 588 4 2,612 — — — 2,612 Nine Months Ended September 30, 2016 $ (9,280 ) $ (1,208 ) $ 17 $ (10,471 ) $ (1,323 ) $ (55 ) $ 11 $ (5,706 )
Earnings Per Common Share of SEACOR	Earnings (Loss) Per Share. Basic earnings (loss) per common share of SEACOR is computed based on the weighted average number of common shares issued and outstanding during the relevant periods. Diluted earnings (loss) per common share of SEACOR is computed based on the weighted average number of common shares issued and outstanding plus the effect of potentially dilutive securities through the application of the treasury stock and if-converted methods. Dilutive securities for this purpose assumes restricted stock grants have vested, common shares have been issued pursuant to the exercise of outstanding stock options and common shares have been issued pursuant to the conversion of all outstanding convertible notes. Computations of basic and diluted earnings (loss) per common share of SEACOR were as follows (in thousands, except share data): Three Months Ended September 30, Nine Months Ended September 30, Net Income (Loss) attributable to SEACOR Average O/S Shares Per Share Net Loss Attributable to SEACOR Average O/S Shares Per Share 2016 Basic Weighted Average Common Shares Outstanding $ (39,803 ) 16,943,647 $ (2.35 ) $ (122,148 ) 16,896,751 $ (7.23 ) Effect of Dilutive Share Awards: Options and Restricted Stock (1) — — — — Convertible Notes (2) — — — — Diluted Weighted Average Common Shares Outstanding $ (39,803 ) 16,943,647 $ (2.35 ) $ (122,148 ) 16,896,751 $ (7.23 ) 2015 Basic Weighted Average Common Shares Outstanding $ 6,965 17,294,927 $ 0.40 $ (11,917 ) 17,616,035 $ (0.68 ) Effect of Dilutive Share Awards: Options and Restricted Stock (1) — 266,180 — — Convertible Notes (3) — — — — Diluted Weighted Average Common Shares Outstanding $ 6,965 17,561,107 $ 0.40 $ (11,917 ) 17,616,035 $ (0.68 ) ______________________ (1) For the three months ended September 30, 2016 and 2015 , diluted earnings per common share of SEACOR excluded 2,041,652 and 846,934 , respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. For the nine months ended September 30, 2016 and 2015 , diluted earnings per common share of SEACOR excluded 2,041,652 and 2,038,450 , respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. (2) For the three months ended September 30, 2016 , diluted earnings per common share of SEACOR excluded 2,382,626 common shares issuable pursuant to the Company’s 2.5% Convertible Senior Notes, 1,825,326 common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes and 2,243,500 common shares issuable pursuant to the Company’s 3.75% Subsidiary Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. For the nine months ended September 30, 2016 , diluted earnings per common share of SEACOR excluded 2,910,688 common shares issuable pursuant to the Company’s 2.5% Convertible Senior Notes, 1,825,326 common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes and 2,243,500 common shares issuable pursuant to the Company’s 3.75% Subsidiary Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. (3) For the three and nine months ended September 30, 2015 , diluted earnings per common share of SEACOR excluded 4,200,525 common shares issuable pursuant to the Company’s 2.5% Convertible Senior Notes and 1,825,326 common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive.
Schedule of Weighted Average Number of Shares [Table Text Block]	Computations of basic and diluted earnings (loss) per common share of SEACOR were as follows (in thousands, except share data): Three Months Ended September 30, Nine Months Ended September 30, Net Income (Loss) attributable to SEACOR Average O/S Shares Per Share Net Loss Attributable to SEACOR Average O/S Shares Per Share 2016 Basic Weighted Average Common Shares Outstanding $ (39,803 ) 16,943,647 $ (2.35 ) $ (122,148 ) 16,896,751 $ (7.23 ) Effect of Dilutive Share Awards: Options and Restricted Stock (1) — — — — Convertible Notes (2) — — — — Diluted Weighted Average Common Shares Outstanding $ (39,803 ) 16,943,647 $ (2.35 ) $ (122,148 ) 16,896,751 $ (7.23 ) 2015 Basic Weighted Average Common Shares Outstanding $ 6,965 17,294,927 $ 0.40 $ (11,917 ) 17,616,035 $ (0.68 ) Effect of Dilutive Share Awards: Options and Restricted Stock (1) — 266,180 — — Convertible Notes (3) — — — — Diluted Weighted Average Common Shares Outstanding $ 6,965 17,561,107 $ 0.40 $ (11,917 ) 17,616,035 $ (0.68 ) ______________________ (1) For the three months ended September 30, 2016 and 2015 , diluted earnings per common share of SEACOR excluded 2,041,652 and 846,934 , respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. For the nine months ended September 30, 2016 and 2015 , diluted earnings per common share of SEACOR excluded 2,041,652 and 2,038,450 , respectively, of certain share awards as the effect of their inclusion in the computation would be anti-dilutive. (2) For the three months ended September 30, 2016 , diluted earnings per common share of SEACOR excluded 2,382,626 common shares issuable pursuant to the Company’s 2.5% Convertible Senior Notes, 1,825,326 common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes and 2,243,500 common shares issuable pursuant to the Company’s 3.75% Subsidiary Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. For the nine months ended September 30, 2016 , diluted earnings per common share of SEACOR excluded 2,910,688 common shares issuable pursuant to the Company’s 2.5% Convertible Senior Notes, 1,825,326 common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes and 2,243,500 common shares issuable pursuant to the Company’s 3.75% Subsidiary Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive. (3) For the three and nine months ended September 30, 2015 , diluted earnings per common share of SEACOR excluded 4,200,525 common shares issuable pursuant to the Company’s 2.5% Convertible Senior Notes and 1,825,326 common shares issuable pursuant to the Company’s 3.0% Convertible Senior Notes as the effect of their inclusion in the computation would be anti-dilutive.
New Accounting Pronouncements	New Accounting Pronouncements. On May 28, 2014, the Financial Accounting Standards Board (“FASB”) issued a comprehensive new revenue recognition standard that will supersede nearly all existing revenue recognition guidance under generally accepted accounting principles in the United States. The core principal of the new standard is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The new standard is effective for annual and interim periods beginning after December 15, 2017 and early adoption is permitted. The Company has not yet selected the method of adoption or determined what impact, if any, the adoption of the new standard will have on its consolidated financial position, results of operations or cash flows. On February 25, 2016, the FASB issued a comprehensive new leasing standard, which improves transparency and comparability among companies by requiring lessees to recognize a lease liability and a corresponding lease asset for virtually all lease contracts. It also requires additional disclosures about leasing arrangements. The new standard is effective for interim and annual periods beginning after December 15, 2018 and requires a modified retrospective approach to adoption. Early adoption is permitted. The Company has not yet determined what impact, if any, the adoption of the new standard will have on its consolidated financial position, results of operations or cash flows. On March 30, 2016, the FASB issued an amendment to the accounting standards, which simplifies several aspects of the accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The amendment is effective for fiscal years beginning after December 15, 2016 and interim periods within those fiscal years and early adoption is permitted. The Company has not yet determined what impact, if any, the adoption of the new standard will have on its consolidated financial position, results of operations or cash flows.
Reclassification, Policy [Policy Text Block]	Reclassifications. Certain reclassifications of prior period information have been made to conform with the presentation of the current period information. These reclassifications had no effect on net income (loss) or cash flows as previously reported.

Derivative Instruments And He20

Derivative Instruments And Hedging Strategies Derivative Instruments, Gain (Loss) (Tables)	9 Months Ended
	Sep. 30, 2016
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Table Text Block]	The Company recognized gains (losses) on derivative instruments not designated as hedging instruments for the nine months ended September 30, 2016 as follows (in thousands): 2016 2015 Exchange option liability on subsidiary convertible senior notes $ (3,328 ) $ — Options on equities and equity indices 3,095 (699 ) Forward currency exchange, option and future contracts (186 ) (474 ) Interest rate swap agreements (18 ) (15 ) Commodity swap, option and future contracts: Exchange traded 328 (2,606 ) Non-exchange traded — 1,499 $ (109 ) $ (2,295 )

Fair Value Measurements Fair Va

Fair Value Measurements Fair Value Measurements (Tables)	9 Months Ended
Fair Value Measurements Fair Value Measurements (Tables)	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS The fair value of an asset or liability is the price that would be received to sell an asset or transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company utilizes a fair value hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value and defines three levels of inputs that may be used to measure fair value. Level 1 inputs are quoted prices in active markets for identical assets or liabilities. Level 2 inputs are observable inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly, including quoted prices for similar assets or liabilities in active markets, quoted prices in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, or inputs derived from observable market data. Level 3 inputs are unobservable inputs that are supported by little or no market activity and are significant to the fair value of the assets or liabilities. The Company’s financial assets and liabilities as of September 30, 2016 that are measured at fair value on a recurring basis were as follows (in thousands): Level 1 Level 2 Level 3 ASSETS Marketable securities (1) $ 78,717 $ — $ — Derivative instruments (included in other receivables) 51 — — Construction reserve funds 161,865 — — LIABILITIES Short sale of marketable securities (1) (included in other current liabilities) 2,745 — — Derivative instruments (included in other current liabilities) 1,479 481 — Exchange option liability on subsidiary convertible senior notes — — 8,938 ______________________ (1) Marketable security losses, net include unrealized losses of $8.0 million and $1.7 million for the three months ended September 30, 2016 and 2015 , respectively, related to marketable security positions held by the Company as of September 30, 2016 . Marketable security losses, net include unrealized losses of $56.8 million and $1.3 million for the nine months ended September 30, 2016 and 2015 , respectively, related to marketable security positions held by the Company as of September 30, 2016 . Level 3 Inputs. The fair value of the exchange option liability on subsidiary convertible senior notes is estimated with significant inputs that are both observable and unobservable in the market and therefore is considered a Level 3 fair value measurement. Observable inputs include market quotes, current interest rates, benchmark yield curves, volatility, quoted prices of securities with similar characteristics and historical dividends. The significant unobservable input used in the fair value measurement is the probability assessment of a SMH Spin-off. In the fair value measurement, holding the observable inputs constant, a significant increase in the probability of a SMH Spin-off would result in a significantly lower exchange option liability. The estimated fair values of the Company’s other financial assets and liabilities as of September 30, 2016 were as follows (in thousands): Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 ASSETS Cash, cash equivalents and restricted cash $ 474,544 $ 474,544 $ — $ — Investments, at cost, in 50% or less owned companies (included in other assets) 9,545 see below Notes receivable from third parties (included in other receivables and other assets) 24,723 see below LIABILITIES Long-term debt, including current portion (1) 1,041,919 — 1,047,546 — ______________________ (1) The estimated fair value includes the embedded conversion options on the Company’s 2.5% and 3.0% Convertible Senior Notes. The carrying value of cash, cash equivalents and restricted cash approximates fair value. The fair value of the Company’s long-term debt was estimated based upon quoted market prices or by using discounted cash flow analyses based on estimated current rates for similar types of arrangements. It was not practicable to estimate the fair value of certain of the Company’s investments, at cost, in 50% or less owned companies because of the lack of quoted market prices and the inability to estimate fair value without incurring excessive costs. It was not practicable to estimate the fair value of the Company’s notes receivable from third parties as the overall returns are uncertain due to certain provisions for additional payments contingent upon future events. Considerable judgment was required in developing certain of the estimates of fair value and, accordingly, the estimates presented herein are not necessarily indicative of the amounts that the Company could realize in a current market exchange. The Company’s other assets and liabilities that were measured at fair value during the nine months ended September 30, 2016 were as follows (in thousands): Level 1 Level 2 Level 3 ASSETS Property and equipment (1) $ — $ 2,853 $ 172,230 Intangible assets, net (1) — — — Investment at cost (included in other assets) (2) — 3,500 — Investment at equity in a 50% or less owned company (3) — — — Notes receivable from third parties (included in other assets) (4) — — — ______________________ (1) During the nine months ended September 30, 2016 , the Company recognized impairment charges of $51.7 million associated with certain Offshore Marine Services’ offshore support vessels (see Note 1) and certain Inland River Services’ equipment currently under construction. The fair value of two offshore support vessels were determined based on the contracted sales prices of the vessels. The fair value of the equipment under construction was determined based on scrap steel value. The fair value of the remaining offshore support vessels were determined based on third-party valuations using significant inputs that are unobservable in the market and therefore are considered a Lev el 3 fair value measurement. The significant unobservable inputs used in the fair value measurement were the construction costs of similar new equipment and estimated economic depreciation for comparably aged assets with a discount applied for economic obsolescence based on current and prior two years’ performance trending. (2) During the nine months ended September 30, 2016 , the Company identified indicators of impairment in a Shipping Services’ cost investment in a foreign container shipping company and, as a consequence, recognized an impairment charge of $6.5 million for an other-than-temporary decline in fair value. The fair value was based on the value of the common stock issued in a recent offering. (3) During the nine months ended September 30, 2016 , the Company identified indicators of impairment in one of Offshore Marine Services’ equity method investments as a result of continuing weak market conditions and, as a consequence, recognized a $0.3 million impairment charge, net of tax, for an other-than-temporary decline in fair value. The investment was determined to have no value and the Company has suspended equity method accounting. (4) During the nine months ended September 30, 2016 , the Company recorded a $6.7 million reserve for one of its notes receivable from third parties following a decline in the underlying collateral value. The collateral was determined to have no value.
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The Company’s financial assets and liabilities as of September 30, 2016 that are measured at fair value on a recurring basis were as follows (in thousands): Level 1 Level 2 Level 3 ASSETS Marketable securities (1) $ 78,717 $ — $ — Derivative instruments (included in other receivables) 51 — — Construction reserve funds 161,865 — — LIABILITIES Short sale of marketable securities (1) (included in other current liabilities) 2,745 — — Derivative instruments (included in other current liabilities) 1,479 481 — Exchange option liability on subsidiary convertible senior notes — — 8,938 ______________________ (1) Marketable security losses, net include unrealized losses of $8.0 million and $1.7 million for the three months ended September 30, 2016 and 2015 , respectively, related to marketable security positions held by the Company as of September 30, 2016 . Marketable security losses, net include unrealized losses of $56.8 million and $1.3 million for the nine months ended September 30, 2016 and 2015 , respectively, related to marketable security positions held by the Company as of September 30, 2016 .
Estimated Fair Value Of Other Financial Assets And Liabilities	The estimated fair values of the Company’s other financial assets and liabilities as of September 30, 2016 were as follows (in thousands): Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 ASSETS Cash, cash equivalents and restricted cash $ 474,544 $ 474,544 $ — $ — Investments, at cost, in 50% or less owned companies (included in other assets) 9,545 see below Notes receivable from third parties (included in other receivables and other assets) 24,723 see below LIABILITIES Long-term debt, including current portion (1) 1,041,919 — 1,047,546 — ______________________ (1) The estimated fair value includes the embedded conversion options on the Company’s 2.5% and 3.0% Convertible Senior Notes.
Fair vale of non-financial assets and liabilities measured on a nonrecurring basis	The Company’s other assets and liabilities that were measured at fair value during the nine months ended September 30, 2016 were as follows (in thousands): Level 1 Level 2 Level 3 ASSETS Property and equipment (1) $ — $ 2,853 $ 172,230 Intangible assets, net (1) — — — Investment at cost (included in other assets) (2) — 3,500 — Investment at equity in a 50% or less owned company (3) — — — Notes receivable from third parties (included in other assets) (4) — — — ______________________ (1) During the nine months ended September 30, 2016 , the Company recognized impairment charges of $51.7 million associated with certain Offshore Marine Services’ offshore support vessels (see Note 1) and certain Inland River Services’ equipment currently under construction. The fair value of two offshore support vessels were determined based on the contracted sales prices of the vessels. The fair value of the equipment under construction was determined based on scrap steel value. The fair value of the remaining offshore support vessels were determined based on third-party valuations using significant inputs that are unobservable in the market and therefore are considered a Lev el 3 fair value measurement. The significant unobservable inputs used in the fair value measurement were the construction costs of similar new equipment and estimated economic depreciation for comparably aged assets with a discount applied for economic obsolescence based on current and prior two years’ performance trending. (2) During the nine months ended September 30, 2016 , the Company identified indicators of impairment in a Shipping Services’ cost investment in a foreign container shipping company and, as a consequence, recognized an impairment charge of $6.5 million for an other-than-temporary decline in fair value. The fair value was based on the value of the common stock issued in a recent offering. (3) During the nine months ended September 30, 2016 , the Company identified indicators of impairment in one of Offshore Marine Services’ equity method investments as a result of continuing weak market conditions and, as a consequence, recognized a $0.3 million impairment charge, net of tax, for an other-than-temporary decline in fair value. The investment was determined to have no value and the Company has suspended equity method accounting. (4) During the nine months ended September 30, 2016 , the Company recorded a $6.7 million reserve for one of its notes receivable from third parties following a decline in the underlying collateral value. The collateral was determined to have no value.

Noncontrolling Interests in S22

Noncontrolling Interests in Subsidiaries (Tables)	9 Months Ended
Noncontrolling Interests in Subsidiaries (Tables)	Sep. 30, 2016
Noncontrolling Interest [Abstract]
Noncontrolling Interests in Subsidiaries [Table Text Block]	oncontrolling interests in the Company’s consolidated subsidiaries were as follows (in thousands): Noncontrolling Interests September 30, 2016 December 31, 2015 Offshore Marine Services: Windcat Workboats 25% $ 5,730 $ 7,484 Other 1.8 % – 30% 265 470 Inland River Services: Other 3.0 % – 51.8% 953 1,146 Shipping Services: Sea-Vista 49% 104,182 88,290 Illinois Corn Processing 30% 20,942 22,272 Other 5.0 % – 14.6% 152 457 $ 132,224 $ 120,119

Share Based Compensation (Table

Share Based Compensation (Tables)	9 Months Ended
Share Based Compensation (Tables)	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share Based Compensation Plans	Transactions in connection with the Company’s share based compensation plans during the nine months ended September 30, 2016 were as follows: Director stock awards granted 2,375 Employee Stock Purchase Plan (“ESPP”) shares issued 41,924 Restricted stock awards granted 137,258 Restricted stock awards canceled 2,867 Stock Option Activities: Outstanding as of December 31, 2015 1,690,899 Granted 153,073 Exercised (49,618 ) Forfeited (18,760 ) Expired (116,004 ) Outstanding as of September 30, 2016 1,659,590 Shares available for future grants and ESPP purchases as of September 30, 2016 567,568

Commitments And Contingencies C

Commitments And Contingencies Capital Commitments (Tables)	9 Months Ended
Commitments And Contingencies Capital Commitments (Tables)	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block]	The Company's capital commitments as of September 30, 2016 by year of expected payment were as follows (in thousands): 2016 2017 2018 2019 Total Offshore Marine Services $ 12,622 $ 38,366 $ 47,374 $ 12,554 $ 110,916 Shipping Services 43,482 26,096 — — 69,578 Inland River Services 17,572 27,465 — — 45,037 Illinois Corn Processing 1,287 — — — 1,287 $ 74,963 $ 91,927 $ 47,374 $ 12,554 $ 226,818 Offshore Marine Services' capital commitments included nine fast support vessels, four supply vessels and one wind farm utility vessel. These commitments included $15.4 million for one supply vessel that may be assumed by a third party at their option. Shipping Services’ capital commitments included two U.S.-flag product tankers, one U.S.-flag chemical and petroleum articulated tug-barge and two U.S.-flag harbor tugs and other equipment and upgrades. Inland River Services’ capital commitments included 38 dry-cargo barges, three inland river towboats and other equipment and upgrades. Subsequent to September 30, 2016 , the Company committed to purchase other equipment for $18.0 million .

Segment Information Segment Inf

Segment Information Segment Information (Tables)	9 Months Ended
Segment Information Segment Information (Tables)	Sep. 30, 2016
Segment Reporting [Abstract]
Operating Results, Capital Expenditures And Assets By Reporting Segment	The following tables summarize the operating results, capital expenditures and assets of the Company’s reportable segments. Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the three months ended September 30, 2016 Operating Revenues: External customers 54,101 40,387 57,350 44,019 11,126 — 206,983 Intersegment 24 707 — — 20 (751 ) — 54,125 41,094 57,350 44,019 11,146 (751 ) 206,983 Costs and Expenses: Operating 41,159 31,496 28,542 39,879 6,618 (898 ) 146,796 Administrative and general 10,588 3,982 6,675 750 3,833 6,417 32,245 Depreciation and amortization 14,213 6,308 8,216 1,055 432 908 31,132 65,960 41,786 43,433 41,684 10,883 6,427 210,173 Gains (Losses) on Asset Dispositions and Impairments, Net (29,233 ) (597 ) 3 — 1 — (29,826 ) Operating Income (Loss) (41,068 ) (1,289 ) 13,920 2,335 264 (7,178 ) (33,016 ) Other Income (Expense): Derivative gains (losses), net 16 — — (328 ) — (862 ) (1,174 ) Foreign currency gains (losses), net (1,084 ) 410 (3 ) — (25 ) 36 (666 ) Other, net 1 (1 ) (5,534 ) — — 74 (5,460 ) Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 790 (171 ) (551 ) — (390 ) — (322 ) Segment Profit (Loss) (41,345 ) (1,051 ) 7,832 2,007 (151 ) Other Income (Expense) not included in Segment Profit (Loss) (14,535 ) Less Equity Losses included in Segment Profit (Loss) 322 Loss Before Taxes and Equity Losses (54,851 ) Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP (1)(2) $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the nine months ended September 30, 2016 Operating Revenues: External customers 171,198 112,814 170,025 134,204 29,708 — 617,949 Intersegment 77 1,708 — — 118 (1,903 ) — 171,275 114,522 170,025 134,204 29,826 (1,903 ) 617,949 Costs and Expenses: Operating 134,254 89,060 86,045 122,321 18,850 (2,384 ) 448,146 Administrative and general 34,915 11,671 20,930 2,318 11,705 20,585 102,124 Depreciation and amortization 44,305 19,699 22,193 3,172 1,335 2,778 93,482 213,474 120,430 129,168 127,811 31,890 20,979 643,752 Gains (Losses) on Asset Dispositions and Impairments, Net (49,970 ) 2,588 3 — (1 ) — (47,380 ) Operating Income (Loss) (92,169 ) (3,320 ) 40,860 6,393 (2,065 ) (22,882 ) (73,183 ) Other Income (Expense): Derivative gains (losses), net 3,077 — — 341 — (3,527 ) (109 ) Foreign currency gains (losses), net (3,463 ) 2,865 (12 ) — (125 ) 84 (651 ) Other, net 266 (5 ) (6,461 ) — (6,723 ) 79 (12,844 ) Equity in Losses of 50% or Less Owned Companies, Net of Tax (364 ) (4,626 ) (2,116 ) — (427 ) — (7,533 ) Segment Profit (Loss) (92,653 ) (5,086 ) 32,271 6,734 (9,340 ) Other Income (Expense) not included in Segment Profit (Loss) (72,900 ) Less Equity Losses included in Segment Profit (Loss) 7,533 Loss Before Taxes and Equity Losses (159,687 ) Capital Expenditures 82,806 17,629 189,988 3,484 — 208 294,115 As of September 30, 2016 Property and Equipment: Historical cost 1,058,048 392,698 592,132 51,592 2,829 30,711 2,128,010 Accumulated depreciation (552,018 ) (161,023 ) (253,116 ) (22,562 ) (2,483 ) (17,427 ) (1,008,629 ) 506,030 231,675 339,016 29,030 346 13,284 1,119,381 Construction in progress 122,633 9,948 328,692 4,578 — (1,191 ) 464,660 Net property and equipment 628,663 241,623 667,708 33,608 346 12,093 1,584,041 Investments, at Equity, and Advances to 50% or Less Owned Companies 133,011 80,004 57,366 — 60,682 — 331,063 Inventories 3,165 2,033 952 9,660 237 — 16,047 Goodwill — 2,427 1,852 — 48,124 — 52,403 Intangible Assets — 5,295 — — 18,201 — 23,496 Other current and long-term assets, excluding cash and near cash assets (3) 103,698 55,710 27,508 11,949 28,708 4,384 231,957 Segment Assets 868,537 387,092 755,386 55,217 156,298 Cash and near cash assets (3) 715,126 Total Assets 2,954,133 ______________________ (1) Operating revenues includes $126.5 million of tangible product sales and operating expenses includes $114.6 million of costs of goods sold. (2) Inventories includes raw materials of $1.9 million and work in process of $1.4 million . (3) Cash and near cash assets includes cash, cash equivalents, restricted cash, marketable securities and construction reserve funds. Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the three months ended September 30, 2015 Operating Revenues: External customers 95,503 53,617 58,673 40,282 13,777 — 261,852 Intersegment 28 693 — — 2 (723 ) — 95,531 54,310 58,673 40,282 13,779 (723 ) 261,852 Costs and Expenses: Operating 70,221 39,487 27,666 33,514 5,854 (757 ) 175,985 Administrative and general 12,753 3,907 6,236 543 6,658 7,795 37,892 Depreciation and amortization 15,252 7,268 6,476 979 152 891 31,018 98,226 50,662 40,378 35,036 12,664 7,929 244,895 Gains (Losses) on Asset Dispositions, Net (246 ) 11,510 — — — — 11,264 Operating Income (Loss) (2,941 ) 15,158 18,295 5,246 1,115 (8,652 ) 28,221 Other Income (Expense): Derivative gains (losses), net (10 ) 50 — (336 ) — (429 ) (725 ) Foreign currency losses, net (1,567 ) (2,173 ) (9 ) — (64 ) (244 ) (4,057 ) Other, net (9 ) — 1,836 — (1 ) (53 ) 1,773 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 1,708 (2,117 ) 5,292 — 240 — 5,123 Segment Profit (Loss) (2,819 ) 10,918 25,414 4,910 1,290 Other Income (Expense) not included in Segment Profit (Loss) (10,867 ) Less Equity Earnings included in Segment Profit (Loss) (5,123 ) Income Before Taxes and Equity Earnings (Losses) 14,345 Offshore Marine Services $’000 Inland River Services $’000 Shipping Services $’000 ICP (1)(2) $’000 Other $’000 Corporate and Eliminations $’000 Total $’000 For the nine months ended September 30, 2015 Operating Revenues: External customers 285,613 169,996 165,754 128,251 54,491 — 804,105 Intersegment 89 2,071 — — 77 (2,237 ) — 285,702 172,067 165,754 128,251 54,568 (2,237 ) 804,105 Costs and Expenses: Operating 216,749 129,556 100,921 107,220 30,787 (2,357 ) 582,876 Administrative and general 38,967 11,556 19,201 1,614 20,411 23,704 115,453 Depreciation and amortization 46,310 21,519 19,822 2,938 1,141 2,797 94,527 302,026 162,631 139,944 111,772 52,339 24,144 792,856 Gains (Losses) on Asset Dispositions and Impairments, Net (3,440 ) 14,479 — — (235 ) — 10,804 Operating Income (Loss) (19,764 ) 23,915 25,810 16,479 1,994 (26,381 ) 22,053 Other Income (Expense): Derivative gains (losses), net (15 ) 309 — (1,114 ) (472 ) (1,003 ) (2,295 ) Foreign currency gains (losses), net 323 (3,086 ) (12 ) — (68 ) (771 ) (3,614 ) Other, net (112 ) — 2,052 4,112 47 63 6,162 Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax 7,509 (6,108 ) 8,796 — (111 ) — 10,086 Segment Profit (Loss) (12,059 ) 15,030 36,646 19,477 1,390 Other Income (Expense) not included in Segment Profit (Loss) (51,125 ) Less Equity Earnings included in Segment Profit (Loss) (10,086 ) Loss Before Taxes and Equity Earnings (Losses) (28,819 ) Capital Expenditures 67,126 66,604 89,015 3,983 41 475 227,244 As of September 30, 2015 Property and Equipment: Historical cost 1,087,471 477,163 454,095 47,256 3,111 30,387 2,099,483 Accumulated depreciation (535,575 ) (164,485 ) (232,603 ) (18,426 ) (2,899 ) (13,733 ) (967,721 ) 551,896 312,678 221,492 28,830 212 16,654 1,131,762 Construction in progress 95,556 23,208 289,714 4,701 — 393 413,572 Net property and equipment 647,452 335,886 511,206 33,531 212 17,047 1,545,334 Investments, at Equity, and Advances to 50% or Less Owned Companies 128,748 102,732 211,017 — 48,321 — 490,818 Inventories 4,837 2,165 719 15,553 — — 23,274 Goodwill 13,367 2,382 1,852 — 48,124 — 65,725 Intangible Assets 1,081 6,191 — — 19,907 — 27,179 Other current and long-term assets, excluding cash and near cash assets (3) 101,254 77,563 31,000 11,125 47,376 4,472 272,790 Segment Assets 896,739 526,919 755,794 60,209 163,940 Cash and near cash assets (3) 741,907 Total Assets 3,167,027 ______________________ (1) Operating revenues includes $119.3 million of tangible product sales and operating expenses includes $98.3 million of costs of goods sold. (2) Inventories includes raw materials of $1.7 million and work in process of $1.7 million . (3) Cash and near cash assets includes cash, cash equivalents, marketable securities and construction reserve funds.

Basis of Presentation and Acc26

Basis of Presentation and Accounting Policies Revenue Recognition (Details) $ in Millions	Sep. 30, 2016USD ($)
Offshore Marine Services [Member]
Deferred Revenue	$ 6.8

Basis of Presentation and Acc27

Basis of Presentation and Accounting Policies Property and Equipment (Details) $ in Millions	9 Months Ended
	Sep. 30, 2016USD ($)
Property, Plant and Equipment [Line Items]
Capitalized Interest Costs, Including Allowance for Funds Used During Construction	$ 14.3
Offshore Support Vessels [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Wind Farm Utility Vessel [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Inland River Dry Cargo Barges [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Inland River Liquid Tank Barges [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years
Inland River Towboats [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years
U.S.-flag Product Tankers [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years
Short-sea Container/RORO Vessels [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Harbor and Offshore Tugs [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years
Ocean Liquid Tank Barge [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years
Terminal And Manufacturing Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years

Basis of Presentation and Acc28

Basis of Presentation and Accounting Policies Impairments of Long-Lived Assets (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Property, Plant and Equipment [Line Items]
Asset Impairment Charges	$ (51.7)	$ (6.9)
Offshore Marine Services [Member]
Property, Plant and Equipment [Line Items]
Asset Impairment Charges	(50.6)
Cost-method Investments [Member] \| Shipping Services Joint Ventures [Member]
Property, Plant and Equipment [Line Items]
Asset Impairment Charges	$ (6.5)

Basis of Presentation and Acc29

Basis of Presentation and Accounting Policies Deferred Gains (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Deferred Gains	$ 122,841	$ 141,881	$ 135,909	$ 159,911
Increase (Decrease) in Deferred Charges	9,003	5,971
Amortization of Deferred Gains	2,850	1,667
Operating Expense [Member]
Amortization of Deferred Gains	17,369	16,897
Gain (Loss) on Asset Dispositions and Impairments, Net [Member]
Amortization of Deferred Gains	$ 1,852	$ 5,437

Basis of Presentation and Acc30

Basis of Presentation and Accounting Policies Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ (9,280)		$ (9,280)		$ (5,528)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(1,208)		(1,208)		(116)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	17		17		24
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Parent			(5,772)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax, Portion Attributable to Parent			(1,680)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Portion Attributable to Parent			(11)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent			(7,463)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest			(795)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax, Portion Attributable to Noncontrolling Interest			(55)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest			(5)
Other Comprehensive Income (Loss), before Tax	369	$ (4,048)	(8,318)	$ (3,467)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Parent			2,020
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Parent			588
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Parent			4
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent			2,612
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Noncontrolling Interest			0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Noncontrolling Interest			0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Noncontrolling Interest			0
Other Comprehensive Income (Loss), Tax	182	(1,309)	(2,612)	(1,130)
Accumulated other comprehensive loss, net of tax	(10,471)		(10,471)		(5,620)
Other Comprehensive Income (Loss), Net of Tax	187	$ (2,739)	(5,706)	$ (2,337)
Non-Controlling Interests In Subsidiaries [Member]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(1,323)		(1,323)		(528)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(55)		(55)		0
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	$ 11		11		$ 16
Other Comprehensive Income (Loss), Net of Tax			$ (855)

Basis of Presentation and Acc31

Basis of Presentation and Accounting Policies Earning Per Common Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net Income (Loss) attributable to SEACOR Holdings Inc.	$ (39,803,000)	$ 6,965,000	$ (122,148,000)	$ (11,917,000)
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	0	0	0	0
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities	0	0	0	0
Net Income (Loss) Available to Common Stockholders, Diluted	$ (39,803,000)	$ 6,965,000	$ (122,148,000)	$ (11,917,000)
Weighted Average Number of Shares Outstanding, Basic	16,943,647	17,294,927	16,896,751	17,616,035
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0	266,180	0	0
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities	0	0	0	0
Weighted Average Number of Shares Outstanding, Diluted	16,943,647	17,561,107	16,896,751	17,616,035
Basic Earnings (Loss) Per Common Share of SEACOR Holdings Inc.	$ (2.35)	$ 0.40	$ (7.23)	$ (0.68)
Diluted Earnings (Loss) Per Common Share of SEACOR Holdings Inc.	$ (2.35)	$ 0.40	$ (7.23)	$ (0.68)
Stock Compensation Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2,041,652	846,934	2,041,652	2,038,450
Two Point Five Percentage Convertible Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2,382,626		4,200,525
Three Point Zero Percentage Convertible Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,825,326		1,825,326
Three Point Seven Five Percentage Convertible Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2,243,500
Three Point Seven Five Percentage Convertible Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	3.75%		3.75%
Three Point Seven Five Percentage Convertible Notes [Member] \| Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			2,243,500
Three Point Zero Percentage Convertible Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	3.00%		3.00%
Three Point Zero Percentage Convertible Notes [Member] \| Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			1,825,326
Two Point Five Percentage Convertible Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	2.50%		2.50%
Two Point Five Percentage Convertible Notes [Member] \| Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			2,910,688

Equipment Acquisitions, Dispo32

Equipment Acquisitions, Dispositions and Depreciation and Impairment Policies (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)equipment	Sep. 30, 2015USD ($)
Property, Plant and Equipment [Line Items]
Payments to Acquire Property, Plant, and Equipment \| $	$ 294,115	$ 227,244
Sales Price Of Equipment \| $	156,100
Proceeds from disposition of property and equipment \| $	146,195	95,396
Proceeds from Issuance of Secured Debt \| $	8,000
Gain (Loss) on Disposition of Property Plant Equipment \| $	11,400
Increase (Decrease) in Deferred Charges \| $	(9,003)	(5,971)
Amortization Of Deferred Gains Included In Gains On Asset Dispositions And Impairments, Net \| $	$ 2,850	1,667
Offshore Support Vessels Fast Support [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Delivered	12
Offshore Support Vessels Supply [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Delivered	1
Number Of Equipments Sold	(1)
Wind Farm Utility Vessel [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Delivered	2
Inland River Towboat [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Delivered	2
Number Of Equipments Sold	(14)
Inland River Dry Cargo Barges [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Delivered	12
U.S.-flag Product Tankers [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Delivered	2
Sale Leaseback Transaction, Net Proceeds, Investing Activities \| $	$ 61,000
Sale Leaseback Transaction, Lease Terms	76
U.S.-flag Harbor Tugs [Member]
Property, Plant and Equipment [Line Items]
Number of Equipment Acquired	1
Number Of Equipments Sold	(1)
Noncash or Part Noncash Divestiture, Amount of Consideration Received \| $	$ 2,000
Offshore Support Vessels Mini Supply [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Sold	(1)
Offshore Support Vessels Standby Safety [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Sold	(4)
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Proceeds from disposition of property and equipment \| $	$ 146,100
Inland River Liquid Tank Barges - 30,000 Barrel [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Sold	(20)
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Proceeds from disposition of property and equipment \| $	$ 100
Gain (Loss) on Asset Dispositions and Impairments, Net [Member]
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property \| $	2,400
Amortization Of Deferred Gains Included In Gains On Asset Dispositions And Impairments, Net \| $	$ 1,852	$ 5,437
Property Subject to Operating Lease [Member] \| U.S.-flag Product Tankers [Member]
Property, Plant and Equipment [Line Items]
Number Of Equipments Sold	(1)
Property Subject to Operating Lease [Member] \| Inland River Liquid Tank Barges - 30,000 Barrel [Member]
Property, Plant and Equipment [Line Items]
Number of Equipments Removed from Service	8
Construction in Progress [Member] \| Inland River Towboat [Member]
Property, Plant and Equipment [Line Items]
Number of Equipments Removed from Service	1

Investments, At Equity, And A33

Investments, At Equity, And Advances To 50% Or Less Owned Companies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Schedule Of Equity Method Investments [Line Items]
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	$ (322)	$ 5,123	$ (7,533)	$ 10,086
Asset Impairment Charges			51,700	$ 6,900
Guarantor Obligations, Maximum Exposure, Undiscounted	1,600		1,600
Allocable Share of Uncalled Capital	1,800		1,800
Falcon Global [Member]
Schedule Of Equity Method Investments [Line Items]
Partners' Capital Account, Contributions			6,800
OSV Partners [Member]
Schedule Of Equity Method Investments [Line Items]
Partners' Capital Account, Contributions			1,200
Other Offshore Marine Services Joint Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Partners' Capital Account, Contributions			200
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital			400
Asset Impairment Charges			300
Guarantor Obligations, Maximum Exposure, Undiscounted	83,400		83,400
SCFCo Holdings [Member]
Schedule Of Equity Method Investments [Line Items]
Partners' Capital Account, Contributions			800
Outstanding Working Capital Advances At End Of Period	27,600		27,600
Sea-Access [Member]
Schedule Of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital			2,000
Partners' Capital Account, Return of Capital			8,400
Seajon [Member]
Schedule Of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital			600
Avion Pacific Limited [Member]
Schedule Of Equity Method Investments [Line Items]
Outstanding Working Capital Advances At End Of Period	3,000		3,000
Payments for Advance to Affiliate			3,000
VA&E [Member]
Schedule Of Equity Method Investments [Line Items]
Outstanding Working Capital Advances At End Of Period	8,300		8,300
Line of Credit Facility, Maximum Borrowing Capacity	6,000		6,000
Proceeds from Unsecured Lines of Credit			10,000
Repayments of Long-term Lines of Credit			(8,900)
Other Corporate Joint Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Payments for Advance to Affiliate			600
Offshore Support Vessels [Member] \| OSV Partners [Member]
Schedule Of Equity Method Investments [Line Items]
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax			1,000
Offshore Support Vessels [Member] \| Other Offshore Marine Services Joint Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax			2,700
Long-term Debt [Member] \| VA&E [Member]
Schedule Of Equity Method Investments [Line Items]
Outstanding Working Capital Advances At End Of Period	1,100		1,100
Subordinated Debt [Member] \| VA&E [Member]
Schedule Of Equity Method Investments [Line Items]
Outstanding Working Capital Advances At End Of Period	$ 1,000		$ 1,000

Long-Term Debt (Details)

Long-Term Debt (Details) $ / shares in Units, $ in Thousands, € in Millions	3 Months Ended			9 Months Ended
	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)$ / shares	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)$ / shares	Sep. 30, 2016EUR (€)	Sep. 30, 2015USD ($)	May 24, 2016USD ($)	Apr. 21, 2016EUR (€)	Dec. 31, 2015$ / shares
Debt Instrument [Line Items]
Common Stock, par value \| $ / shares		$ 0.01		$ 0.01					$ 0.01
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 64,800		$ 64,800
Debt extinguishment gains		557	$ (434)	5,395		$ (29,970)
Letters of Credit Outstanding, Amount		26,200		26,200
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 1,600		$ 1,600
Seven Point Three Seven Five Percentage Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		7.375%		7.375%
Debt Instrument, Repurchased Face Amount		$ 22,600		$ 22,600
Debt Instrument, Repurchase Amount		20,300		20,300
Debt extinguishment gains				2,100
Senior Notes, Noncurrent		$ 173,400		$ 173,400
Three Point Zero Percentage Convertible Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.00%		3.00%
Two Point Five Percentage Convertible Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.50%		2.50%
Debt Instrument, Repurchased Face Amount		$ 117,400		$ 117,400
Convertible Debt		167,100		167,100
Debt Instrument, Repurchase Amount		$ 114,900		114,900
Debt extinguishment gains				3,300
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Repayments of long-term debt				2,500
Proceeds from Issuance of Debt				7,500
Payments of Debt Issuance Costs				100
Windcat Workboats Ltd. [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Proceeds from Lines of Credit				23,500	€ 21
Line of Credit Facility, Current Borrowing Capacity							$ 25,000
Payments of Debt Issuance Costs				600
Windcat Workboats Ltd. [Member] \| Other Debt Obligations [Member]
Debt Instrument [Line Items]
Repayments of Other Debt				$ 22,900
Sea-Cat Crewzer III [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		2.76%		2.76%
Debt Instrument, Fee				0.0045	0.0045
Proceeds from Issuance of Debt				$ 16,100
Payments of Debt Issuance Costs				2,600
Debt Instrument, Face Amount \| €								€ 27.6
Sea-Vista [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Proceeds from Lines of Credit				71,000
Line of Credit Facility, Current Borrowing Capacity		$ 16,000		16,000
Sea-Vista [Member] \| Term A-1 Loan [Member]
Debt Instrument [Line Items]
Repayments of long-term debt				2,900
Illinois Corn Processing LLC [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity		15,900		15,900
Long-term Debt [Member] \| Two Point Five Percentage Convertible Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchase Amount		107,800		107,800
Additional Paid-In Capital [Member] \| Two Point Five Percentage Convertible Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchase Amount		$ 7,100		$ 7,100
Subsequent Event [Member] \| Sea-Vista [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Proceeds from Lines of Credit	$ 5,000
Minimum [Member] \| Windcat Workboats Ltd. [Member]
Debt Instrument [Line Items]
Debt Instrument, Fee				0.012	0.012
Maximum [Member] \| Windcat Workboats Ltd. [Member]
Debt Instrument [Line Items]
Debt Instrument, Fee				0.0132	0.0132
London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member] \| Windcat Workboats Ltd. [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				3.00%	3.00%
London Interbank Offered Rate (LIBOR) [Member] \| Maximum [Member] \| Windcat Workboats Ltd. [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				3.30%	3.30%

Derivative Instruments And He35

Derivative Instruments And Hedging Strategies (Fair Values Of Derivative Instruments) (Details) $ in Thousands	Sep. 30, 2016USD ($)
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 51
Derivative Liability	10,898
Foreign currency exchange, option and future contracts
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	0
Derivative Liability	150
Interest rate swap agreements
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	0
Derivative Liability	229
Not Designated as Hedging Instrument [Member] \| Foreign currency exchange, option and future contracts
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	0
Derivative Liability	102
Not Designated as Hedging Instrument [Member] \| Commodity swap, option and future contracts, exchange traded
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	51
Derivative Liability	1,479
Three Point Seven Five Percentage Convertible Notes [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative Asset	0
Embedded Derivative, Fair Value of Embedded Derivative Liability	$ 8,938

Derivative Instruments And He36

Derivative Instruments And Hedging Strategies (Narrative) (Details) $ in Thousands, € in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016EUR (€)
Derivative [Line Items]
Derivative losses on cash flow hedges	$ (187)	$ (1,540)	$ (3,855)	$ (2,225)
Fixed interest rate	(0.027%)		(0.027%)		(0.027%)
Derivative, Notional Amount	$ 16,900		$ 16,900		€ 15
Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 9,700		$ 9,700
Cash Flow Hedging [Member] \| Mexmar [Member]
Derivative [Line Items]
Fixed interest rate range, minimum	1.71%		1.71%		1.71%
Fixed interest rate range, maximum	2.05%		2.05%		2.05%
Derivative, Notional Amount	$ 108,600		$ 108,600
Cash Flow Hedging [Member] \| Sea-Cat Crewzer II [Member]
Derivative [Line Items]
Fixed interest rate	(1.52%)		(1.52%)		(1.52%)
Derivative, Notional Amount	$ 23,900		$ 23,900
Cash Flow Hedging [Member] \| Sea Cat Crewzer [Member]
Derivative [Line Items]
Fixed interest rate	(1.52%)		(1.52%)		(1.52%)
Derivative, Notional Amount	$ 21,100		$ 21,100
Cash Flow Hedging [Member] \| Seajon [Member]
Derivative [Line Items]
Fixed interest rate	(2.79%)		(2.79%)		(2.79%)
Derivative, Notional Amount	$ 30,900		$ 30,900
Three Point Seven Five Percentage Convertible Notes [Member]
Derivative [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.75%		3.75%		3.75%
Construction in Progress [Member]
Derivative [Line Items]
Deferred Gain (Loss) on Discontinuation of Foreign Currency Fair Value Hedge	$ (200)		$ (200)

Derivative Instruments And He37

Derivative Instruments And Hedging Strategies (Recognized Gains (Losses) On Derivative Instruments Not Designated As Hedging Instruments) (Details) $ in Thousands, € in Millions	9 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016EUR (€)
Derivative [Line Items]
Derivative gains (losses), net	$ (109)	$ (2,295)
Derivative, Fixed Interest Rate	0.027%		0.027%
Derivative, Notional Amount	$ 16,900		€ 15
Options on equities and equity indices
Derivative [Line Items]
Derivative gains (losses), net	3,095	(699)
Forward Currency Exchange, Option And Future Contracts [Member]
Derivative [Line Items]
Derivative gains (losses), net	(186)	(474)
Interest rate swap agreements
Derivative [Line Items]
Derivative gains (losses), net	(18)	(15)
Commodity swap, option and future contracts, exchange traded
Derivative [Line Items]
Derivative gains (losses), net	328	(2,606)
Commodity swap, option and future contracts, non-exchange traded
Derivative [Line Items]
Derivative gains (losses), net	0	1,499
Not Designated as Hedging Instrument [Member] \| Forward Currency Exchange, Option And Future Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	2,100
Not Designated as Hedging Instrument [Member] \| OSV Partners [Member] \| Interest rate swap agreements
Derivative [Line Items]
Derivative, Notional Amount	$ 39,300
Derivative, Lower Fixed Interest Rate Range	1.89%		1.89%
Derivative, Higher Fixed Interest Rate Range	2.27%		2.27%
Not Designated as Hedging Instrument [Member] \| Dynamic Offshore Drilling Ltd [Member] \| Interest rate swap agreements
Derivative [Line Items]
Derivative, Fixed Interest Rate	1.30%		1.30%
Derivative, Notional Amount	$ 76,400
Not Designated as Hedging Instrument [Member] \| Falcon Global [Member] \| Interest rate swap agreements
Derivative [Line Items]
Derivative, Fixed Interest Rate	2.06%		2.06%
Derivative, Notional Amount	$ 62,500
Three Point Seven Five Percentage Convertible Notes [Member]
Derivative [Line Items]
Embedded Derivative, Gain on Embedded Derivative	$ (3,328)	$ 0

Fair Value Measurements (Financ

Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Construction Reserve Funds	$ 161,865		$ 161,865		$ 255,408
Exchange Option Liability on Subsidiary Convertible Senior Notes	8,938		8,938		$ 5,611
Marketable security gains (losses), net	(8,000)	$ (1,700)	(56,800)	$ (1,300)
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	78,717		78,717
Derivative instruments (included in other receivables)	51		51
Construction Reserve Funds	161,865		161,865
Short sales of marketable securities	2,745		2,745
Derivative instruments (included in other current liabilities)	1,479		1,479
Exchange Option Liability on Subsidiary Convertible Senior Notes	0		0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0		0
Derivative instruments (included in other receivables)	0		0
Construction Reserve Funds	0		0
Short sales of marketable securities	0		0
Derivative instruments (included in other current liabilities)	481		481
Exchange Option Liability on Subsidiary Convertible Senior Notes	0		0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0		0
Derivative instruments (included in other receivables)	0		0
Construction Reserve Funds	0		0
Short sales of marketable securities	0		0
Derivative instruments (included in other current liabilities)	0		0
Exchange Option Liability on Subsidiary Convertible Senior Notes	$ 8,938		$ 8,938

Fair Value Measurements (Estima

Fair Value Measurements (Estimated Fair Value Of Other Financial Assets And Liabilities) (Details) $ in Thousands	Sep. 30, 2016USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, Carrying Amount	$ 474,544
Investments, at cost, in 50% or less owned companies (included in other assets), Carrying Amount	9,545
Notes receivable from other business ventures (included in other receivables and other assets), Carrying Amount	24,723
Long-term debt, including current portion, Carrying Amount	1,041,919
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, Carrying Amount	474,544
Debt Instrument, Fair Value Disclosure	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, Carrying Amount	0
Debt Instrument, Fair Value Disclosure	1,047,546
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, Carrying Amount	0
Debt Instrument, Fair Value Disclosure	$ 0
Two Point Five Percentage Convertible Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.50%
Three Point Zero Percentage Convertible Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.00%

Fair Value Measurements Fair 40

Fair Value Measurements Fair Value Measurements (Non-financial Assets Measured on a Non-recurring Basis) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset Impairment Charges	$ (51,700)	$ (6,900)
Provision for Loan and Lease Losses	6,700
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and Equipment, Fair Value Disclosure	0
Intangible Assets, Net, Fair Value Disclosure	0
Investments at cost, Fair Value Disclosure	0
Notes Receivable, Fair Value Disclosure	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and Equipment, Fair Value Disclosure	2,853
Intangible Assets, Net, Fair Value Disclosure	0
Investments at cost, Fair Value Disclosure	3,500
Notes Receivable, Fair Value Disclosure	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and Equipment, Fair Value Disclosure	172,230
Intangible Assets, Net, Fair Value Disclosure	0
Investments at cost, Fair Value Disclosure	0
Notes Receivable, Fair Value Disclosure	0
Other Offshore Marine Services Joint Ventures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset Impairment Charges	(300)
Other Offshore Marine Services Joint Ventures [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Method Investments, Fair Value Disclosure	0
Other Offshore Marine Services Joint Ventures [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Method Investments, Fair Value Disclosure	0
Other Offshore Marine Services Joint Ventures [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Method Investments, Fair Value Disclosure	0
Cost-method Investments [Member] \| Shipping Services Joint Ventures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset Impairment Charges	$ (6,500)

Stock Repurchases (Details)

Stock Repurchases (Details) $ in Millions	9 Months Ended
Stock Repurchases (Details) $ in Millions	Sep. 30, 2016USD ($)shares
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 64.8
Restricted Stock [Member]
Treasury Stock, Shares, Acquired \| shares	47,455
Treasury Stock, Value, Acquired, Cost Method	$ 2.4

Noncontrolling Interests in S42

Noncontrolling Interests in Subsidiaries (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries	$ 132,224		$ 132,224		$ 120,119
Net Income (Loss)	(34,026)	$ 16,405	(105,483)	$ (9,997)
Net Income (Loss) Attributable to Noncontrolling Interest	$ 5,777	$ 9,440	$ 16,665	1,920
Illinois Corn Processing LLC [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries					22,272
Offshore Marine Services [Member] \| Windcat Workboats Ltd. [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	25.00%		25.00%
Noncontrolling interests in subsidiaries	$ 5,730		$ 5,730		7,484
Assets, Net	22,900		22,900
Net Income (Loss)			(3,600)	3,400
Net Income (Loss) Attributable to Noncontrolling Interest			(900)
Offshore Marine Services [Member] \| Other Offshore Marine Services Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries	265		265		470
Inland River Services [Member] \| Other Inland River Services Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries	$ 953		$ 953		1,146
Shipping Services [Member] \| Sea-Vista [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	49.00%		49.00%
Noncontrolling interests in subsidiaries	$ 104,182		$ 104,182		88,290
Assets, Net	$ 212,600		212,600
Net Income (Loss)			$ 32,400	(9,600)
Illinois Corn Processing LLC [Member] \| Illinois Corn Processing LLC [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	30.00%		30.00%
Noncontrolling interests in subsidiaries	$ 20,942		$ 20,942
Assets, Net	69,800		69,800
Net Income (Loss)			6,600	19,400
Net Income (Loss) Attributable to Noncontrolling Interest			2,000	$ 5,800
Other Segments [Member] \| Other Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling interests in subsidiaries	$ 152		$ 152		$ 457
Minimum [Member] \| Offshore Marine Services [Member] \| Other Offshore Marine Services Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	1.80%		1.80%
Minimum [Member] \| Inland River Services [Member] \| Other Inland River Services Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	3.00%		3.00%
Minimum [Member] \| Other Segments [Member] \| Other Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	5.00%		5.00%
Maximum [Member] \| Offshore Marine Services [Member] \| Other Offshore Marine Services Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	30.00%		30.00%
Maximum [Member] \| Inland River Services [Member] \| Other Inland River Services Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	51.80%		51.80%
Maximum [Member] \| Other Segments [Member] \| Other Noncontrolling Interests [Member]
Noncontrolling Interests in Subsidiaries [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	14.60%		14.60%

Multiemployer Pension Plans (De

Multiemployer Pension Plans (Details) $ in Millions	Sep. 30, 2015USD ($)
American Maritime Officers Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and other postretirement benefit plans, withdrawal liability	$ 46.7

Share Based Compensation (Share

Share Based Compensation (Share Based Compensation Plans) (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2016shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Director stock awards granted	2,375
Employee Stock Purchase Plan shares issued	41,924
Restricted stock awards granted	137,258
Restricted stock awards forfeited	2,867
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options, Outstanding as of December 31, 2015	1,690,899
Stock Option, Granted	153,073
Stock Option, Exercised	(49,618)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	18,760
Stock Option, Expired	(116,004)
Stock Options, Outstanding as of September 30, 2016	1,659,590
Shares available for future grants and ESPP purchases as of September 30, 2016	567,568

Commitments And Contingencies (

Commitments And Contingencies (Narrative) (Details)	3 Months Ended	12 Months Ended
Commitments And Contingencies (Narrative) (Details)	Mar. 31, 2016	Dec. 31, 2013claim	Dec. 31, 2012claim	Dec. 31, 2010claim	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)equipment
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year						$ 74,963,000
Unrecorded Unconditional Purchase Obligation, Due in Second Years						91,927,000
Unrecorded Unconditional Purchase Obligation, Due in Third Year						47,374,000
Unrecorded Unconditional Purchase Obligation Due in Fourth Year						12,554,000
Unrecorded Unconditional Purchase Obligation						$ 226,818,000
Multi-district Litigation [Member]
Loss Contingencies [Line Items]
Claims Filed \| claim				1
Loss Contingency, Number of Plaintiffs	11
Abney Litigation [Member]
Loss Contingencies [Line Items]
Claims Filed \| claim			668
Abood Litigation [Member]
Loss Contingencies [Line Items]
Claims Filed \| claim		174
Offshore Support Vessels Fast Support [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Maximum Quantity \| equipment						9
Offshore Support Vessels Supply [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Maximum Quantity						0
Wind Farm Utility Vessel [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Maximum Quantity \| equipment						1
U.S.-flag Product Tankers [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Maximum Quantity \| equipment						2
U.S. Flag Articulated Tug-Barge [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Maximum Quantity \| equipment						1
U.S.-flag Harbor Tugs [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Maximum Quantity \| equipment						2
Inland River Dry Cargo Barges [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Maximum Quantity						38
Inland River Towboats [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Maximum Quantity \| equipment						3
Offshore Marine Services [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year						$ 12,622,000
Unrecorded Unconditional Purchase Obligation, Due in Second Years						38,366,000
Unrecorded Unconditional Purchase Obligation, Due in Third Year						47,374,000
Unrecorded Unconditional Purchase Obligation Due in Fourth Year						12,554,000
Unrecorded Unconditional Purchase Obligation						110,916,000
Offshore Marine Services [Member] \| Offshore Support Vessels Supply [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Contingent Upon a Third Party Option						$ 15,400,000
Unrecorded Unconditional Purchase Obligation, Contingent Upon a Third Party Option, Maximum Quantity						1
Shipping Services [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year						$ 43,482,000
Unrecorded Unconditional Purchase Obligation, Due in Second Years						26,096,000
Unrecorded Unconditional Purchase Obligation, Due in Third Year						0
Unrecorded Unconditional Purchase Obligation Due in Fourth Year						0
Unrecorded Unconditional Purchase Obligation						69,578,000
Inland River Services [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year						17,572,000
Unrecorded Unconditional Purchase Obligation, Due in Second Years						27,465,000
Unrecorded Unconditional Purchase Obligation, Due in Third Year						0
Unrecorded Unconditional Purchase Obligation Due in Fourth Year						0
Unrecorded Unconditional Purchase Obligation						45,037,000
Illinois Corn Processing LLC [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year						1,287,000
Unrecorded Unconditional Purchase Obligation, Due in Second Years						0
Unrecorded Unconditional Purchase Obligation, Due in Third Year						0
Unrecorded Unconditional Purchase Obligation Due in Fourth Year						0
Unrecorded Unconditional Purchase Obligation						$ 1,287,000
Subsequent Event [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation					$ 18,000,000

Segment Information (Operating

Segment Information (Operating Results, Capital Expenditures And Assets By Reportable Segments) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Operating Revenues	$ 206,983,000	$ 261,852,000	$ 617,949,000	$ 804,105,000
Costs and Expenses [Abstract]
Administrative and general	32,245,000	37,892,000	102,124,000	115,453,000
Depreciation and amortization	31,132,000	31,018,000	93,482,000	94,527,000
Total costs and expenses	210,173,000	244,895,000	643,752,000	792,856,000
Gains (Losses) on Asset Dispositions and Impairments, Net	(29,826,000)	11,264,000	(47,380,000)	10,804,000
Operating Income (Loss)	(33,016,000)	28,221,000	(73,183,000)	22,053,000
Other Income and Expenses [Abstract]
Derivative gains (losses), net	(1,174,000)	(725,000)	(109,000)	(2,295,000)
Foreign currency gains (losses), net	(666,000)	(4,057,000)	(651,000)	(3,614,000)
Other, net	(5,460,000)	1,773,000	(12,844,000)	6,162,000
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(322,000)	5,123,000	(7,533,000)	10,086,000
Loss Before Taxes and Equity Earnings	(54,851,000)	14,345,000	(159,687,000)	(28,819,000)
Capital Expenditures			294,115,000	227,244,000
Property, Plant and Equipment, Gross	2,128,010,000		2,128,010,000		$ 2,123,201,000
Accumulated depreciation	(1,008,629,000)		(1,008,629,000)		(994,181,000)
Construction in progress	464,660,000		464,660,000		454,605,000
Net property and equipment	1,584,041,000		1,584,041,000		1,583,625,000
Inventories	16,047,000		16,047,000		24,768,000
Goodwill	52,403,000		52,403,000		52,340,000
Intangible Assets, Net	23,496,000		23,496,000		26,392,000
Total assets	2,954,133,000	3,167,027,000	2,954,133,000	3,167,027,000	$ 3,185,419,000
Offshore Marine Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	54,101,000	95,503,000	171,198,000	285,613,000
Inland River Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	40,387,000	53,617,000	112,814,000	169,996,000
Shipping Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	57,350,000	58,673,000	170,025,000	165,754,000
Illinois Corn Processing LLC [Member]
Segment Reporting Information [Line Items]
Operating Revenues	44,019,000	40,282,000	134,204,000	128,251,000
Other Income and Expenses [Abstract]
Sales Revenue, Goods, Net			126,500,000	119,300,000
Cost of Goods Sold			114,600,000	98,300,000
Inventory, Raw Materials	1,900,000	1,700,000	1,900,000	1,700,000
Inventory, Work in Process	1,400,000	1,700,000	1,400,000	1,700,000
Other Segments [Member]
Segment Reporting Information [Line Items]
Operating Revenues	11,126,000	13,777,000	29,708,000	54,491,000
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	0	0	0	0
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Revenues	206,983,000	261,852,000	617,949,000	804,105,000
Costs and Expenses [Abstract]
Operating Expenses	146,796,000	175,985,000	448,146,000	582,876,000
Administrative and general	32,245,000	37,892,000	102,124,000	115,453,000
Depreciation and amortization	31,132,000	31,018,000	93,482,000	94,527,000
Total costs and expenses	210,173,000	244,895,000	643,752,000	792,856,000
Gains (Losses) on Asset Dispositions and Impairments, Net	(29,826,000)	11,264,000	(47,380,000)	10,804,000
Operating Income (Loss)	(33,016,000)	28,221,000	(73,183,000)	22,053,000
Other Income and Expenses [Abstract]
Derivative gains (losses), net	(1,174,000)	(725,000)	(109,000)	(2,295,000)
Foreign currency gains (losses), net	(666,000)	(4,057,000)	(651,000)	(3,614,000)
Other, net	(5,460,000)	1,773,000	(12,844,000)	6,162,000
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(322,000)	5,123,000	(7,533,000)	10,086,000
Capital Expenditures			294,115,000	227,244,000
Property, Plant and Equipment, Gross	2,128,010,000	2,099,483,000	2,128,010,000	2,099,483,000
Accumulated depreciation	(1,008,629,000)	(967,721,000)	(1,008,629,000)	(967,721,000)
Property, Plant and Equipment, Net In Service	1,119,381,000	1,131,762,000	1,119,381,000	1,131,762,000
Construction in progress	464,660,000	413,572,000	464,660,000	413,572,000
Net property and equipment	1,584,041,000	1,545,334,000	1,584,041,000	1,545,334,000
Investments, at Equity, and Advances to 50% or Less Owned Companies	331,063,000	490,818,000	331,063,000	490,818,000
Inventories	16,047,000	23,274,000	16,047,000	23,274,000
Goodwill	52,403,000	65,725,000	52,403,000	65,725,000
Intangible Assets, Net	23,496,000	27,179,000	23,496,000	27,179,000
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	231,957,000	272,790,000	231,957,000	272,790,000
Operating Segments [Member] \| Offshore Marine Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	54,125,000	95,531,000	171,275,000	285,702,000
Costs and Expenses [Abstract]
Operating Expenses	41,159,000	70,221,000	134,254,000	216,749,000
Administrative and general	10,588,000	12,753,000	34,915,000	38,967,000
Depreciation and amortization	14,213,000	15,252,000	44,305,000	46,310,000
Total costs and expenses	65,960,000	98,226,000	213,474,000	302,026,000
Gains (Losses) on Asset Dispositions and Impairments, Net	(29,233,000)	(246,000)	(49,970,000)	(3,440,000)
Operating Income (Loss)	(41,068,000)	(2,941,000)	(92,169,000)	(19,764,000)
Other Income and Expenses [Abstract]
Derivative gains (losses), net	16,000	(10,000)	3,077,000	(15,000)
Foreign currency gains (losses), net	(1,084,000)	(1,567,000)	(3,463,000)	323,000
Other, net	1,000	(9,000)	266,000	(112,000)
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	790,000	1,708,000	(364,000)	7,509,000
Segment Profit (Loss)	(41,345,000)	(2,819,000)	(92,653,000)	(12,059,000)
Capital Expenditures			82,806,000	67,126,000
Property, Plant and Equipment, Gross	1,058,048,000	1,087,471,000	1,058,048,000	1,087,471,000
Accumulated depreciation	(552,018,000)	(535,575,000)	(552,018,000)	(535,575,000)
Property, Plant and Equipment, Net In Service	506,030,000	551,896,000	506,030,000	551,896,000
Construction in progress	122,633,000	95,556,000	122,633,000	95,556,000
Net property and equipment	628,663,000	647,452,000	628,663,000	647,452,000
Investments, at Equity, and Advances to 50% or Less Owned Companies	133,011,000	128,748,000	133,011,000	128,748,000
Inventories	3,165,000	4,837,000	3,165,000	4,837,000
Goodwill	0	13,367,000	0	13,367,000
Intangible Assets, Net	0	1,081,000	0	1,081,000
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	103,698,000	101,254,000	103,698,000	101,254,000
Total assets	868,537,000	896,739,000	868,537,000	896,739,000
Operating Segments [Member] \| Inland River Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	41,094,000	54,310,000	114,522,000	172,067,000
Costs and Expenses [Abstract]
Operating Expenses	31,496,000	39,487,000	89,060,000	129,556,000
Administrative and general	3,982,000	3,907,000	11,671,000	11,556,000
Depreciation and amortization	6,308,000	7,268,000	19,699,000	21,519,000
Total costs and expenses	41,786,000	50,662,000	120,430,000	162,631,000
Gains (Losses) on Asset Dispositions and Impairments, Net	(597,000)	11,510,000	2,588,000	14,479,000
Operating Income (Loss)	(1,289,000)	15,158,000	(3,320,000)	23,915,000
Other Income and Expenses [Abstract]
Derivative gains (losses), net	0	50,000	0	309,000
Foreign currency gains (losses), net	410,000	(2,173,000)	2,865,000	(3,086,000)
Other, net	(1,000)	0	(5,000)	0
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(171,000)	(2,117,000)	(4,626,000)	(6,108,000)
Segment Profit (Loss)	(1,051,000)	10,918,000	(5,086,000)	15,030,000
Capital Expenditures			17,629,000	66,604,000
Property, Plant and Equipment, Gross	392,698,000	477,163,000	392,698,000	477,163,000
Accumulated depreciation	(161,023,000)	(164,485,000)	(161,023,000)	(164,485,000)
Property, Plant and Equipment, Net In Service	231,675,000	312,678,000	231,675,000	312,678,000
Construction in progress	9,948,000	23,208,000	9,948,000	23,208,000
Net property and equipment	241,623,000	335,886,000	241,623,000	335,886,000
Investments, at Equity, and Advances to 50% or Less Owned Companies	80,004,000	102,732,000	80,004,000	102,732,000
Inventories	2,033,000	2,165,000	2,033,000	2,165,000
Goodwill	2,427,000	2,382,000	2,427,000	2,382,000
Intangible Assets, Net	5,295,000	6,191,000	5,295,000	6,191,000
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	55,710,000	77,563,000	55,710,000	77,563,000
Total assets	387,092,000	526,919,000	387,092,000	526,919,000
Operating Segments [Member] \| Shipping Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	57,350,000	58,673,000	170,025,000	165,754,000
Costs and Expenses [Abstract]
Operating Expenses	28,542,000	27,666,000	86,045,000	100,921,000
Administrative and general	6,675,000	6,236,000	20,930,000	19,201,000
Depreciation and amortization	8,216,000	6,476,000	22,193,000	19,822,000
Total costs and expenses	43,433,000	40,378,000	129,168,000	139,944,000
Gains (Losses) on Asset Dispositions and Impairments, Net	3,000	0	3,000	0
Operating Income (Loss)	13,920,000	18,295,000	40,860,000	25,810,000
Other Income and Expenses [Abstract]
Derivative gains (losses), net	0	0	0	0
Foreign currency gains (losses), net	(3,000)	(9,000)	(12,000)	(12,000)
Other, net	(5,534,000)	1,836,000	(6,461,000)	2,052,000
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(551,000)	5,292,000	(2,116,000)	8,796,000
Segment Profit (Loss)	7,832,000	25,414,000	32,271,000	36,646,000
Capital Expenditures			189,988,000	89,015,000
Property, Plant and Equipment, Gross	592,132,000	454,095,000	592,132,000	454,095,000
Accumulated depreciation	(253,116,000)	(232,603,000)	(253,116,000)	(232,603,000)
Property, Plant and Equipment, Net In Service	339,016,000	221,492,000	339,016,000	221,492,000
Construction in progress	328,692,000	289,714,000	328,692,000	289,714,000
Net property and equipment	667,708,000	511,206,000	667,708,000	511,206,000
Investments, at Equity, and Advances to 50% or Less Owned Companies	57,366,000	211,017,000	57,366,000	211,017,000
Inventories	952,000	719,000	952,000	719,000
Goodwill	1,852,000	1,852,000	1,852,000	1,852,000
Intangible Assets, Net	0	0	0	0
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	27,508,000	31,000,000	27,508,000	31,000,000
Total assets	755,386,000	755,794,000	755,386,000	755,794,000
Operating Segments [Member] \| Illinois Corn Processing LLC [Member]
Segment Reporting Information [Line Items]
Operating Revenues	44,019,000	40,282,000	134,204,000	128,251,000
Costs and Expenses [Abstract]
Operating Expenses	39,879,000	33,514,000	122,321,000	107,220,000
Administrative and general	750,000	543,000	2,318,000	1,614,000
Depreciation and amortization	1,055,000	979,000	3,172,000	2,938,000
Total costs and expenses	41,684,000	35,036,000	127,811,000	111,772,000
Gains (Losses) on Asset Dispositions and Impairments, Net	0	0	0	0
Operating Income (Loss)	2,335,000	5,246,000	6,393,000	16,479,000
Other Income and Expenses [Abstract]
Derivative gains (losses), net	(328,000)	(336,000)	341,000	(1,114,000)
Foreign currency gains (losses), net	0	0	0	0
Other, net	0	0	0	4,112,000
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	0	0	0	0
Segment Profit (Loss)	2,007,000	4,910,000	6,734,000	19,477,000
Capital Expenditures			3,484,000	3,983,000
Property, Plant and Equipment, Gross	51,592,000	47,256,000	51,592,000	47,256,000
Accumulated depreciation	(22,562,000)	(18,426,000)	(22,562,000)	(18,426,000)
Property, Plant and Equipment, Net In Service	29,030,000	28,830,000	29,030,000	28,830,000
Construction in progress	4,578,000	4,701,000	4,578,000	4,701,000
Net property and equipment	33,608,000	33,531,000	33,608,000	33,531,000
Investments, at Equity, and Advances to 50% or Less Owned Companies	0	0	0	0
Inventories	9,660,000	15,553,000	9,660,000	15,553,000
Goodwill	0	0	0	0
Intangible Assets, Net	0	0	0	0
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	11,949,000	11,125,000	11,949,000	11,125,000
Total assets	55,217,000	60,209,000	55,217,000	60,209,000
Operating Segments [Member] \| Other Segments [Member]
Segment Reporting Information [Line Items]
Operating Revenues	11,146,000	13,779,000	29,826,000	54,568,000
Costs and Expenses [Abstract]
Operating Expenses	6,618,000	5,854,000	18,850,000	30,787,000
Administrative and general	3,833,000	6,658,000	11,705,000	20,411,000
Depreciation and amortization	432,000	152,000	1,335,000	1,141,000
Total costs and expenses	10,883,000	12,664,000	31,890,000	52,339,000
Gains (Losses) on Asset Dispositions and Impairments, Net	1,000	0	(1,000)	(235,000)
Operating Income (Loss)	264,000	1,115,000	(2,065,000)	1,994,000
Other Income and Expenses [Abstract]
Derivative gains (losses), net	0	0	0	(472,000)
Foreign currency gains (losses), net	(25,000)	(64,000)	(125,000)	(68,000)
Other, net	0	(1,000)	(6,723,000)	47,000
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	(390,000)	240,000	(427,000)	(111,000)
Segment Profit (Loss)	(151,000)	1,290,000	(9,340,000)	1,390,000
Capital Expenditures			0	41,000
Property, Plant and Equipment, Gross	2,829,000	3,111,000	2,829,000	3,111,000
Accumulated depreciation	(2,483,000)	(2,899,000)	(2,483,000)	(2,899,000)
Property, Plant and Equipment, Net In Service	346,000	212,000	346,000	212,000
Construction in progress	0	0	0	0
Net property and equipment	346,000	212,000	346,000	212,000
Investments, at Equity, and Advances to 50% or Less Owned Companies	60,682,000	48,321,000	60,682,000	48,321,000
Inventories	237,000	0	237,000	0
Goodwill	48,124,000	48,124,000	48,124,000	48,124,000
Intangible Assets, Net	18,201,000	19,907,000	18,201,000	19,907,000
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	28,708,000	47,376,000	28,708,000	47,376,000
Total assets	156,298,000	163,940,000	156,298,000	163,940,000
Operating Segments [Member] \| Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	(751,000)	(723,000)	(1,903,000)	(2,237,000)
Costs and Expenses [Abstract]
Operating Expenses	(898,000)	(757,000)	(2,384,000)	(2,357,000)
Administrative and general	6,417,000	7,795,000	20,585,000	23,704,000
Depreciation and amortization	908,000	891,000	2,778,000	2,797,000
Total costs and expenses	6,427,000	7,929,000	20,979,000	24,144,000
Gains (Losses) on Asset Dispositions and Impairments, Net	0	0	0	0
Operating Income (Loss)	(7,178,000)	(8,652,000)	(22,882,000)	(26,381,000)
Other Income and Expenses [Abstract]
Derivative gains (losses), net	(862,000)	(429,000)	(3,527,000)	(1,003,000)
Foreign currency gains (losses), net	36,000	(244,000)	84,000	(771,000)
Other, net	74,000	(53,000)	79,000	63,000
Equity in Earnings (Losses) of 50% or Less Owned Companies, Net of Tax	0	0	0	0
Capital Expenditures			208,000	475,000
Property, Plant and Equipment, Gross	30,711,000	30,387,000	30,711,000	30,387,000
Accumulated depreciation	(17,427,000)	(13,733,000)	(17,427,000)	(13,733,000)
Property, Plant and Equipment, Net In Service	13,284,000	16,654,000	13,284,000	16,654,000
Construction in progress	(1,191,000)	393,000	(1,191,000)	393,000
Net property and equipment	12,093,000	17,047,000	12,093,000	17,047,000
Investments, at Equity, and Advances to 50% or Less Owned Companies	0	0	0	0
Inventories	0	0	0	0
Goodwill	0	0	0	0
Intangible Assets, Net	0	0	0	0
Other Current And Long-Term Assets, Excluding Cash And Near Cash Assets	4,384,000	4,472,000	4,384,000	4,472,000
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	0	0	0	0
Intersegment Eliminations [Member] \| Offshore Marine Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	(24,000)	28,000	(77,000)	89,000
Intersegment Eliminations [Member] \| Inland River Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	(707,000)	693,000	(1,708,000)	2,071,000
Intersegment Eliminations [Member] \| Shipping Services [Member]
Segment Reporting Information [Line Items]
Operating Revenues	0	0	0	0
Intersegment Eliminations [Member] \| Illinois Corn Processing LLC [Member]
Segment Reporting Information [Line Items]
Operating Revenues	0	0	0	0
Intersegment Eliminations [Member] \| Other Segments [Member]
Segment Reporting Information [Line Items]
Operating Revenues	(20,000)	2,000	(118,000)	77,000
Intersegment Eliminations [Member] \| Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues	751,000	(723,000)	1,903,000	(2,237,000)
Segment Reconciling Items [Member]
Other Income and Expenses [Abstract]
Other Income (Expense) not included in Segment Profit (Loss)	14,535,000	10,867,000	72,900,000	51,125,000
Less Equity Earnings included in Segment Profit (Loss)	322,000	(5,123,000)	7,533,000	(10,086,000)
Cash And Near Cash Assets	$ 715,126,000	$ 741,907,000	$ 715,126,000	$ 741,907,000